Vocabularies

English Vocabulary Dictionary | Word Meanings, Definitions & Examples

noun
/ˌɒpəˈrɛtə/

a short opera with light and humorous themes

"The theater staged a famous operetta by Gilbert and Sullivan."

noun
/ˈoʊpiət/

a drug containing opium or its derivatives, used to relieve pain or cause sleep

"The doctor prescribed an opiate to relieve the patient's pain."

💬

opine

verb
/oʊˈpaɪn/

to express an opinion or belief

"The professor opined that the policy would fail."

noun
/əˈpɪnjən/

A belief, judgment, or viewpoint about something, not necessarily based on fact.

"Everyone is entitled to their own opinion."

noun
/əˈpoʊnənt/

A person who competes against or disagrees with another.

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

adjective
/ˌɑːpərˈtuːn/

Happening at a suitable or convenient time.

"She arrived at an opportune moment to help."

noun
/ˌɑːpərˈtuːnɪzəm/

The practice of taking advantage of opportunities regardless of principles or ethics.

"His decision was driven by opportunism, not values."

noun
/ˌɑːpərˈtuːnɪst/

A person who takes advantage of situations for personal gain, often disregarding principles.

"He is seen as an opportunist who always puts his interests first."

opportunities definition card — visual illustration of the meaning
noun
ˌɒpəˈtjuːnɪtiz

A set of circumstances that makes it possible to do something.

"Investing in emerging markets provides new opportunities."

noun
/ˌɒp.əˈtjuː.nə.ti/

A favorable chance or set of circumstances that makes it possible to do something.

"She seized the opportunity to study abroad."

verb
/əˈpəʊz/

to disagree with or fight against something

"He opposed the new policy at the meeting."

adjective
/əˈpəʊzd/

being against or in disagreement with something

"She is strongly opposed to animal testing."

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Opposite

adjective
/ˈɒp.əz.ɪt/

Completely different; on the other side or facing something.

"The two houses are on opposite sides of the street."

noun
/ˌɒpəˈzɪʃən/

the action of opposing or resisting something

"The opposition to the new law was strong."

oppress definition card — visual illustration of the meaning
verb
/əˈprɛs/

To keep someone in subservience and hardship by unjust treatment.

"The regime continued to oppress its citizens."

noun
/əˈpreʃ.ən/

cruel or unjust treatment or exercise of authority; the state of being subject to harsh treatment

"The people fought against political oppression."

adjective
/əˈprɛs.ɪv/

Harsh and authoritarian; overwhelming; causing distress; tyrannical;

"The oppressive heat made it difficult to work outside during the summer."

adjective
/əˈprəʊ.bri.əs/

Expressing strong criticism or scorn.

"He made opprobrious remarks about his opponent."

opprobrium definition card — visual illustration of the meaning
noun
/əˈprəʊ.bri.əm/

Harsh criticism or public disgrace.

"The scandal brought opprobrium on the politician."

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opt

verb
/ɒpt/

to choose or decide to do something instead of something else

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

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optic

adjective
/ˈɒptɪk/

Relating to the eye or vision.

"The optic nerve carries signals from the eye to the brain."

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optical

adjective
/ˈɒptɪkəl/

related to or used in seeing or sight

"The optical illusion fooled everyone at the exhibition."

noun
/ɒpˈtɪʃən/

A person who makes or sells glasses and contact lenses.

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

noun
/ˈɒptɪks/

The branch of physics dealing with light and vision.

"She studied optics to understand how lenses work."

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

The best or most favorable temperature for a particular purpose

"Winter provides optimal temperature for farming."

optimally definition card — visual illustration of the meaning
adverb
/ˈɒp.tɪ.məl.i/

In the most effective or efficient way possible.

"Tasks should be allocated optimally for maximum output."

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

Hopefulness and confidence about the future.

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

noun
/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."

adjective
/ˌɑːp.təˈmɪs.tɪk/

hopeful and confident about the future

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

optimization definition card — visual illustration of the meaning
noun
ˌɒp.tɪ.mɪˈzeɪ.ʃən

The action of making the best or most effective use of a situation or resource.

"The company focused on optimization of resources to maximize profits."

optimize definition card — visual illustration of the meaning
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optimize

verb
ˈɒptɪmaɪz

Make the best or most effective use of a situation, opportunity, or resource.

"They optimized the software for faster performance."

optimized definition card — visual illustration of the meaning
adjective
/ˈɒp.tɪ.maɪzd/

Made as effective, perfect, or functional as possible.

"Optimized irrigation techniques conserve water in farming."

optimum definition card — visual illustration of the meaning
noun/adjective
/ˈɒptɪməm/

The most favorable condition or level for growth, success, or productivity.

"This room temperature provides the optimum conditions for plant growth."

⚖️

Option

noun
/ˈɒpʃən/

A choice or possibility available among alternatives.

"You have the option to pay by card or cash."

adjective
/ˈɒpʃənəl/

Not required; left to personal choice.

"The dress code for the party is optional."

noun
/ɒpˈtɒmɪtrɪst/

A healthcare professional who examines eyes and prescribes corrective lenses.

"The optometrist prescribed new glasses for her."

noun
/ɒpˈtɒmətri/

The practice or profession of examining the eyes and prescribing corrective lenses.

"She studied optometry at the university to become an eye specialist."

opulence definition card — visual illustration of the meaning
noun
/ˈɒpjʊləns/

Great wealth, luxury, or abundance.

"The palace displayed a level of opulence that amazed the visitors."

adjective
/ˈɒpjʊlənt/

Ostentatiously rich, luxurious, or lavish.

"They hosted an opulent wedding with gold decorations."

🎼

opus

noun
/ˈəʊpəs/

A creative work, especially a large and important piece of music or art.

"The composer considered the symphony his greatest opus."

or

conjunction
/ɔːr/

used to link alternatives

"You can have tea or coffee."

noun
/ˈɒrəkəl/

A person or source considered to provide wise and insightful advice or prophecy.

"In ancient Greece, people visited the oracle at Delphi for guidance."

adjective
/əˈrækjələr/

Resembling an oracle; giving wise, mysterious, or prophetic statements

"Her oracular words left the audience deep in thought."

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Oral

adjective
/ˈɔːrəl/

Spoken rather than written; relating to the mouth

"The student had to give an oral presentation."

noun
/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."

noun
/ˈɒrɪndʒ/

a fruit that is typically round and orange in color

"She ate an orange for breakfast."

noun
/ˈɔːrɪndʒfɪn ˈleɪbiːoʊ/

a freshwater fish species native to South Asian rivers, commonly found in Bangladesh and India

"The orangefin labeo is an important food fish in Bangladesh."

🎤

orate

verb
/ˈɔːreɪt/

To speak in a formal, often pompous manner

"He began to orate at the ceremony."

noun
/ɔːˈreɪʃən/

A formal speech, especially one given on a ceremonial occasion

"The president delivered an inspiring oration."