Vocabularies

English Vocabulary Dictionary | Word Meanings, Definitions & Examples

oak definition card — visual illustration of the meaning
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oak

noun B2
/oʊk/

a large tree that produces acorns and has strong, hard wood

"The old oak tree provided shade for the entire yard."

noun B2
/ˈoʊtˌmiːl/

A type of porridge made from ground oats, often eaten for breakfast.

"She eats a bowl of oatmeal every morning for breakfast."

Obedience definition card — visual illustration of the meaning
noun B2
/oʊˈbiː.di.əns/

compliance with an order, request, or law; submission to authority

"Children should show obedience to their parents."

obesity definition card — visual illustration of the meaning
noun B2
/oʊˈbiːsəti/

The condition of being very overweight, especially to a degree that it is harmful to health.

"Obesity is a growing health problem in many countries."

Objection definition card — visual illustration of the meaning
noun B2
/əbˈdʒɛkʃən/

an expression or feeling of disapproval or opposition

"The lawyer raised an objection during the trial."

Obligation definition card — visual illustration of the meaning
noun B2
/ˌɒblɪˈɡeɪʃən/

a duty or commitment

"You have an obligation to follow the rules."

oblige definition card — visual illustration of the meaning
verb B2
/əˈblaɪdʒ/

to do something as a favor or kindness for someone

"She obliged by helping him with the task."

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obscure

adjective, verb B2
/əbˈskjʊr/

Not clearly expressed or understood; to make something difficult to see or understand.

"The meaning of the poem was obscure to most readers."

Observation definition card — visual illustration of the meaning
noun B2
/ˌɒbzəˈveɪʃən/

the action or process of observing something carefully in order to gain information

"The scientist made an observation during the experiment."

observations definition card — visual illustration of the meaning
noun B2
/ˌɒb.zəˈveɪ.ʃənz/

The action or process of observing something carefully.

"Observations of distant galaxies provide new insights."

observed definition card — visual illustration of the meaning
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observed

verb B2
əbˈzɜːrvd

To celebrate or keep a religious or other festival.

"The day is observed annually to raise awareness."

observer definition card — visual illustration of the meaning
noun B2
/əbˈzɜːvər/

a person who watches or notices something

"The observer took notes during the meeting."

obsession definition card — visual illustration of the meaning
noun B2
/əbˈsɛʃən/

An idea, thought, or concern that continually preoccupies or intrudes on a person's mind.

"His obsession with success drove him to work day and night."

obtain definition card — visual illustration of the meaning
verb B2
/əbˈteɪn/

to get, acquire, or secure something

"She managed to obtain a scholarship for her studies."

noun B2
/ˈɒkjʊpənt/

A person who resides in or is present in a house, vehicle, seat, or place.

"The car had three occupants at the time of the accident."

occupied definition card — visual illustration of the meaning
adjective; verb (past participle) B2
/ˈɒkjʊpaɪd/

being in use or taken; filled or lived in; controlled or held by force

"The room is occupied, so please wait outside."

occupy definition card — visual illustration of the meaning
verb B2
/ˈɒkjʊpaɪ/

to take control or possession of a place or thing

"The workers will occupy the building until the renovations are completed."

oddly definition card — visual illustration of the meaning
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oddly

adverb B2
/ˈɒdli/

in a strange or unusual way; unexpectedly

"Oddly, he didn’t seem upset by the bad news."

odds definition card — visual illustration of the meaning
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odds

noun B2
/ɒdz/

the likelihood or probability of something happening; chances for or against something

"The odds of winning the lottery are very low."

Odour definition card — visual illustration of the meaning
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Odour

noun B2
/ˈoʊ.dər/

a distinctive smell, especially an unpleasant one

"The odour of fresh bread filled the kitchen."

Offence definition card — visual illustration of the meaning
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Offence

noun B2
/əˈfens/

a breach of law or rule; an annoyance or resentment

"Stealing is a serious offence punishable by law."

offend definition card — visual illustration of the meaning
verb B2
/əˈfɛnd/

to cause someone to feel upset, insulted, or annoyed

"She didn’t mean to offend anyone with her remarks."

offense definition card — visual illustration of the meaning
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offense

noun B2
/əˈfɛns/

an illegal act; a crime

"The offense was committed in broad daylight."

Offensive definition card — visual illustration of the meaning
adjective B2
/əˈfɛnsɪv/

Causing hurt, anger, or annoyance; also relating to attacking in sports or war.

"His offensive remarks upset everyone at the meeting."

offering definition card — visual illustration of the meaning
noun B2
/ˈɒfərɪŋ/

something that is given, especially as a gift or contribution

"The company’s latest offering is an eco-friendly car."

officially definition card — visual illustration of the meaning
adverb B2
/əˈfɪʃəli/

in a formal or authorized way

"The building was officially opened by the mayor."

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Oily

adjective B2
/ˈɔɪl.i/

covered with oil; containing oil; greasy

"Her oily skin needs special care."

omit definition card — visual illustration of the meaning
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omit

verb B2
/oʊˈmɪt/

to leave out or exclude; to fail to include something

"Please don't omit any important details from your report."

one-third definition card — visual illustration of the meaning
noun B2
/wʌn θɜːd/

one part of something that is divided into three equal parts

"One-third of the class was absent today."

ongoing definition card — visual illustration of the meaning
adjective B2
/ˈɒnɡəʊɪŋ/

continuing; still in progress

"The ongoing project will finish next month."

Openly definition card — visual illustration of the meaning
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Openly

adverb B2
/ˈəʊpənli/

in a way that is not secret or hidden

"He spoke openly about his past mistakes."

operational definition card — visual illustration of the meaning
adjective B2
/ˌɒpəˈreɪʃənl/

related to or engaged in the operation of something

"The team is ready for the operational phase of the project."

operator definition card — visual illustration of the meaning
noun B2
/ˈɒpəreɪtər/

a person who operates equipment, a business, or controls something

"The machine operator ensured that everything ran smoothly."

Opponent definition card — visual illustration of the meaning
noun B2
/əˈpoʊnənt/

A person who competes against or disagrees with another.

"The boxer defeated his opponent in the final round."

oppose definition card — visual illustration of the meaning
verb B2
/əˈpəʊz/

to disagree with or fight against something

"He opposed the new policy at the meeting."

opposed definition card — visual illustration of the meaning
adjective B2
/əˈpəʊzd/

being against or in disagreement with something

"She is strongly opposed to animal testing."

opposition definition card — visual illustration of the meaning
noun B2
/ˌɒpəˈzɪʃən/

the action of opposing or resisting something

"The opposition to the new law was strong."

opt definition card — visual illustration of the meaning
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opt

verb B2
/ɒpt/

to choose or decide to do something instead of something else

"Many students opt to study abroad for better opportunities."

noun B2
/ɒpˈtɪʃən/

A person who makes or sells glasses and contact lenses.

"The optician adjusted my new glasses to fit better."

optimal definition card — visual illustration of the meaning
adjective B2
/ˈɒptɪməl/

Best or most favorable; ideal.

"This diet plan provides the optimal balance of nutrients."

optimal temperature definition card — visual illustration of the meaning
adjective + noun B2
ˈɒptɪməl ˈtempərətʃər

The best or most favorable temperature for a particular purpose

"Winter provides optimal temperature for farming."

optimism definition card — visual illustration of the meaning
noun B2
/ˈɒptɪmɪzəm/

Hopefulness and confidence about the future.

"Her optimism kept the team motivated during tough times."

Optimist definition card — visual illustration of the meaning
noun B2
/ˈɒptɪmɪst/

A person who tends to be hopeful and confident about the future or the success of something.

"Even in tough times, she remained an optimist."

optimistic definition card — visual illustration of the meaning
adjective B2
/ˌɑːp.təˈmɪs.tɪk/

hopeful and confident about the future

"She is optimistic about the success of her new project."

adjective B2
/ˈɒpʃənəl/

Not required; left to personal choice.

"The dress code for the party is optional."

Oral definition card — visual illustration of the meaning
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Oral

adjective B2
/ˈɔːrəl/

Spoken rather than written; relating to the mouth

"The student had to give an oral presentation."

Orang-Outang definition card — visual illustration of the meaning
noun B2
/ɔːˈræŋ.ʊˌtæŋ/

a large arboreal ape with long reddish hair, long arms, and hooked hands and feet, native to Borneo and Sumatra

"The orangutan swings gracefully through the forest canopy."

orbit definition card — visual illustration of the meaning
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orbit

noun B2
/ˈɔːbɪt/

the curved path that a planet, satellite, or object follows around another body in space

"The Earth moves in an orbit around the Sun."

orchestra definition card — visual illustration of the meaning
noun B2
/ˈɔːkɪstrə/

a large group of musicians playing different instruments together

"The orchestra performed beautifully at the concert."

adjective B2
/ˈɔː.də.li/

well-organized; systematic; peaceful

"Please keep your desk orderly and clean."