Vocabularies

English Vocabulary Dictionary | Word Meanings, Definitions & Examples

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notation

noun C1
/noʊˈteɪʃən/

A system of symbols or signs used to represent information, especially in mathematics or music.

"The teacher explained the notation used in the algebra equations."

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notch

noun C1
/nɑːtʃ/

A small cut or groove on the edge or surface of something; a level or degree of achievement.

"He carved a notch on the stick to mark the days."

noun C1
/ˌnoʊtəˈraɪəti/

The state of being famous or well-known for something bad.

"The criminal gained notoriety for his daring escapes."

preposition/adverb/conjunction C1
/ˌnɒtwɪθˈstændɪŋ/

In spite of; despite

"Notwithstanding the challenges, the team completed the project."

verb C1
/ˈnʌrɪʃ/

To provide with food or other substances necessary for growth, health, and good condition

"Good books nourish the mind."

nourishment definition card — visual illustration of the meaning
noun C1
/ˈnʌrɪʃmənt/

The food or substances necessary for growth, health, and good condition

"The soup provided warmth and nourishment."

Nova definition card — visual illustration of the meaning

Nova

noun C1
/ˈnoʊvə/

A star showing a sudden large increase in brightness and then slowly returning to its original state

"Astronomers observed a bright nova in the sky."

Novice definition card — visual illustration of the meaning
noun C1
/ˈnɒvɪs/

A person new to or inexperienced in a field or activity.

"He is still a novice at playing the guitar."

☠️

noxious

adjective C1
/ˈnɑːkʃəs/

harmful, poisonous, or very unpleasant

"The factory released noxious fumes into the air."

nuance definition card — visual illustration of the meaning
noun C1
/ˈnuːˌɑːns/

a subtle difference in meaning, expression, or sound

"The artist captured every nuance of light in the painting."

adjective C1
ˈnuː.ɑːnst

Characterized by subtle shades of meaning or expression; having or characterized by subtle and often appealingly complex qualities.

"His argument was nuanced and well-structured."

nucleus definition card — visual illustration of the meaning
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nucleus

noun C1
/ˈnjuː.kli.əs/

The central and most important part of something, forming the basis for its activity and growth; in biology, the central part of a cell.

"The nucleus of the atom contains protons and neutrons."

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nudge

verb C1
/nʌdʒ/

To push someone gently, usually with your elbow, in order to attract attention.

"She nudged him to be quiet during the meeting."

nullify definition card — visual illustration of the meaning
verb C1
/ˈnʌlɪfaɪ/

to make legally null and void; to cancel or invalidate

"The contract was nullified due to fraud."

Nurture definition card — visual illustration of the meaning
verb, noun C1
/ˈnɜːrtʃər/

To care for and encourage the growth or development of someone or something.

"Parents should nurture their children's talents."

nurturing definition card — visual illustration of the meaning
adjective/noun C1
/ˈnɜːr.tʃɚ.ɪŋ/

The process of caring for and encouraging growth or development.

"A nurturing environment helps children thrive."

Nut meg definition card — visual illustration of the meaning
noun C1
/ˈnʌt.meg/

a spice made from the seed of the fruit of an evergreen tree, used in cooking and baking

"The recipe called for a teaspoon of ground nutmeg to flavor the custard."

nutrient deficiency definition card — visual illustration of the meaning
noun C1
/ˈnjuːtrɪənt dɪˈfɪʃənsi/

A lack of essential nutrients required for healthy plant growth, which can result in poor crop development, reduced yields, and increased susceptibility to diseases.

"Nutrient deficiency in the soil can reduce crop productivity."

nutrient-dense definition card — visual illustration of the meaning
adjective C1
/ˈnjuː.tri.ənt dɛns/

Rich in nutrients and high nutritional value.

"Organic food is often more nutrient-dense than processed food."

nutritious crops definition card — visual illustration of the meaning
adjective + noun C1
njuˈtrɪʃəs krɒps

Plants or vegetables that are rich in nutrients and beneficial for health

"Winter vegetables are considered nutritious crops."

Oar definition card — visual illustration of the meaning
🚣

Oar

noun C1
/ɔːr/

a long pole with a flat blade used to row a boat

"He dipped the oar into the water and pulled the boat forward."

Oasis definition card — visual illustration of the meaning
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Oasis

noun C1
/oʊˈeɪ.sɪs/

a fertile spot in a desert where water is found; a pleasant relief

"After hours in the desert, they finally reached an oasis."

Oath definition card — visual illustration of the meaning
📜

Oath

noun C1
/oʊθ/

a solemn promise, often invoking a divine witness

"She took an oath to tell the truth in court."

⚖️

obese

adjective C1
/oʊˈbiːs/

Extremely overweight; having an excessive amount of body fat.

"The doctor advised the obese patient to adopt a healthier lifestyle."

Obituary definition card — visual illustration of the meaning
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Obituary

noun C1
/əˈbɪtʃueri/

A notice of a person's death, often published in a newspaper with a brief biography.

"The newspaper published an obituary for the famous writer."

adjective C1
/əbˈdʒek.ʃən.ə.bəl/

arousing distaste or opposition; unpleasant or offensive

"His objectionable behavior made everyone uncomfortable."

noun C1
/əbˈdʒɛktər/

a person who expresses opposition or disapproval to something

"The objector raised his concerns during the town meeting."

obligatory definition card — visual illustration of the meaning
adjective C1
/əˈblɪɡətɔːri/

Required by law, rule, or custom; mandatory.

"Wearing a helmet is obligatory when riding a motorcycle."

adjective C1
/əˈblaɪdʒɪŋ/

Willing to help or do favors; accommodating.

"The staff at the hotel were very obliging and friendly."

↗️

Oblique

adjective C1
/əˈbliːk/ or /oʊˈbliːk/

Not explicit or direct in addressing a point; slanting or indirect.

"She made an oblique reference to his past mistakes."

obliterate definition card — visual illustration of the meaning
verb C1
/əˈblɪtəreɪt/

To completely destroy, remove, or wipe out.

"The town was obliterated by the powerful earthquake."

oblivion definition card — visual illustration of the meaning
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oblivion

noun C1
/əˈblɪviən/

The state of being completely forgotten or unknown; the state of being unconscious or unaware.

"The ancient city fell into oblivion after the empire collapsed."

oblivious definition card — visual illustration of the meaning
adjective C1
/əˈblɪviəs/

Not aware of or concerned about what is happening around one.

"He was oblivious to the danger approaching him."

adjective C1
/əbˈnɒkʃəs/

Extremely unpleasant, offensive, or annoying.

"The obnoxious behavior of the guest ruined the party."

noun C1
/əbˈzɜːvəns/

The practice of following a custom, rule, or religious law.

"The festival is held in observance of a centuries-old tradition."

adjective C1
/əbˈzɜːvənt/

Quick to notice details or attentive to rules and customs.

"She is very observant and rarely misses any detail."

noun C1
/əbˈzɜːrvətɔːri/

A building equipped for observing astronomical or meteorological events.

"The observatory is open to the public on weekends."

obsess definition card — visual illustration of the meaning
verb C1
/əbˈsɛs/

To preoccupy or fill the mind of someone continually and to an excessive degree.

"She tends to obsess over small details."

adjective C1
/əbˈsɛsɪv/

Relating to or characterized by an obsession; thinking about something too much.

"He has an obsessive interest in cleanliness."

obsolescence definition card — visual illustration of the meaning
noun C1
/ˌɒbsəˈlɛsəns/

The state of being no longer useful or in fashion; becoming outdated.

"The rapid obsolescence of smartphones makes people upgrade frequently."

🗑️

obsolete

adjective C1
/ˌɒbsəˈliːt/

No longer in use or out of date.

"Floppy disks are now completely obsolete."

👩‍⚕️

obstetrician

noun C1
/ˌɒbstəˈtrɪʃən/

A doctor specializing in pregnancy, childbirth, and women's reproductive health.

"The obstetrician monitored the mother’s health throughout the pregnancy."

obstinate definition card — visual illustration of the meaning
adjective C1
/ˈɒbstɪnət/

Refusing to change one’s opinion or behavior despite persuasion.

"The child was obstinate about not eating vegetables."

obstruct definition card — visual illustration of the meaning
verb C1
/əbˈstrʌkt/

To block or prevent movement, progress, or action.

"A fallen tree obstructed the road."

noun C1
/əbˈstrʌkʃən/

Something that blocks or gets in the way; the action of obstructing.

"There was an obstruction on the railway track."

adjective C1
/əbˈstrʌk.tɪv/

deliberately creating difficulties or preventing progress; hindering or blocking something

"The obstructive policies hindered economic growth."

adjective C1
/əbˈtjuːs/

slow to understand; annoyingly insensitive; also refers to an angle greater than 90° and less than 180°

"He was too obtuse to realize the insult."

occult definition card — visual illustration of the meaning
adjective C1
/əˈkʌlt/

Relating to mysterious, supernatural, or magical powers and practices.

"She had always been fascinated by the occult and its hidden knowledge."

Occurrence definition card — visual illustration of the meaning
noun C1
/əˈkʌrəns/

An incident, event, or something that happens.

"The occurrence of such storms is rare in this region."

ocean acidification definition card — visual illustration of the meaning
noun C1
ˈoʊʃən əˌsɪdɪfɪˈkeɪʃən

The ongoing decrease in the pH of the Earth's oceans, caused by the absorption of carbon dioxide from the atmosphere.

"Ocean acidification is caused by atmospheric CO2 absorption."