English Reference

Word

air

US/ˈɛɹ/

UK/ˈeə/

Definitions

01the gas we breathe

A1 · Beginner Uncountable noun Science

n. the mixture of gases that surrounds the Earth and that we breathe.

n. the gaseous substance constituting the Earth's atmosphere, primarily nitrogen and oxygen. Uncountable in this general sense.

“I stepped outside to get some fresh air after the long meeting.”

“The high altitude meant the air was thin, making it difficult for the climbers to maintain their pace without supplemental oxygen.”

Synonyms

02the sky or open space

A2 · Elementary Uncountable noun

n. the space above the ground or the sky.

n. the open space above the earth's surface.

“The birds flew high up in the air.”

“The acrobat was tossed into the air, performing three perfect flips before being caught by her partner.”

Synonyms

Antonyms

03a person's manner

B2 · Upper Intermediate Countable noun

n. the way a person looks or behaves that gives a certain impression.

n. the outward appearance, manner, or carriage of a person, or the character of a place.

“He had an air of confidence that made everyone trust him.”

“She walked into the boardroom with an air of quiet authority that immediately silenced the bickering executives.”

04a melody

C1 · Advanced Countable noun Music Formal

n. a simple tune or melody.

n. a rhythmic sequence of single notes; a melody or song, often a solo.

“The flautist played a traditional Irish air.”

“The soprano performed a hauntingly beautiful air from the seventeenth century, accompanied only by a lute.”

Synonyms

05broadcast signal

B1 · Intermediate Uncountable noun

n. the system used to send out radio or television signals.

n. the medium through which radio and television signals are transmitted.

“The radio station went off the air due to a power cut.”

“The interview was pulled from the air just minutes before it was scheduled to begin due to legal concerns.”

Synonyms

06to ventilate

B1 · Intermediate

v. to let fresh air into a room or to dry clothes outside.

v. to expose something to the open air for the purpose of freshening, drying, or ventilating.

“Open the windows to air the room out after you finish painting.”

“She hung the damp linens on the line to air them in the afternoon breeze.”

Synonyms

ventilatefreshen

Antonyms

07to express publicly

B2 · Upper Intermediate

v. to tell people your opinions or complaints.

v. to make opinions, grievances, or ideas known to the public.

“The meeting gave employees a chance to air their concerns.”

“The town hall meeting provided a forum for residents to air their grievances regarding the proposed highway expansion.”

Synonyms

voiceexpresspublicise

Antonyms

08to broadcast

B1 · Intermediate

v. to show a programme on television or play it on the radio.

v. to transmit a programme by radio or television. Can be used transitively or intransitively.

“The final episode will air next Tuesday at 8 p.m.”

“The documentary is set to air nationwide, reaching an estimated audience of five million viewers on its premiere night.”

09to ignore someone

C1 · Advanced Slang · British English

v. to ignore someone on purpose, especially by not replying to their messages.

v. to intentionally ignore a person, particularly by failing to respond to digital communication.

“I can't believe he aired my text for three days.”

“After their argument at the party, she completely aired him on all social media platforms.”

Teaching tip

This usage is specific to Multicultural London English (MLE) and youth slang; it may not be understood by older speakers or those outside the UK.

Synonyms

Antonyms

Word family

Related words

Idioms

Domains

ChemistryMedicineMusicPhilosophy

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.A1 MoversIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.2.0–3.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 1.0–1.50–23TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.120–224
Frequency
Very common
Level
A1 · BeginnerOxford
Updated

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