English Reference

Word

fat

US/ˈfæt/

UK/fˈæt/

Definitions

01biological substance

A2 · Elementary Uncountable noun Science

n. a natural oily substance found in the bodies of people and animals.

n. a specialized animal tissue with high lipid content used for energy storage and insulation.

“Whales have a thick layer of fat to keep them warm in cold water.”

“The body stores excess calories as adipose tissue, commonly known as fat, to serve as a metabolic reserve during periods of food scarcity.”

Synonyms

lipidblubber

Antonyms

02cooking ingredient

A2 · Elementary Uncountable noun Cooking

n. oil, butter, or lard used in cooking.

n. any of various solid or liquid ester compounds used as a medium for heat transfer or as a nutritional component in food preparation.

“You should drain the excess fat from the pan before adding the vegetables.”

“The chef recommended using animal fat rather than vegetable oil to achieve a more authentic flavour profile in the traditional pastry.”

Synonyms

03body size

A1 · Beginner Informal

adj. having a lot of extra flesh on the body.

adj. carrying a significant amount of excess body fat; often carries a derogatory or informal register depending on context.

“The cat grew fat because it spent all day sleeping and eating.”

“The doctor advised the patient that being clinically fat increased the risk of developing cardiovascular complications later in life.”

Pitfall

He is a fat.

He is fat.

When describing a person's appearance, use 'fat' as an adjective, not as a noun.

Antonyms

04thick or large

B1 · Intermediate

adj. thick, wide, or containing a lot of something.

adj. notably thick in diameter or substantial in volume.

“He used a fat permanent marker to write the sign.”

“The executive received a fat bonus at the end of the fiscal year due to the company's record-breaking profits.”

Antonyms

05rich sound

C1 · Advanced Music Informal · Technical

adj. having a full, deep, and powerful sound.

adj. characterised by a rich, full-bodied timbre with prominent low-frequency resonance.

“The producer wanted a fat bass sound for the new dance track.”

“By layering multiple oscillators, the synthesist created a fat lead tone that cut through the dense arrangement of the rock anthem.”

Synonyms

Antonyms

thintinny

06to hit the ground first

C2 · Proficiency Sports Technical

v. to hit the ground with your club before hitting the ball.

v. to strike the turf behind the ball during a swing, resulting in a poor shot with reduced distance.

“I fatted my iron shot and the ball only went half the distance.”

“The amateur golfer tended to fat his wedge shots whenever he played from a soft, damp lie.”

Antonyms

Word family

NOUN

fat(A1)

ADJECTIVE

Idioms

Domains

ComputingMusicPrintingTheater

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

QR code

englishreference.com/q/fat

English Reference