English Reference

Word

buff

Phoneticsbuff

US/ˈbəf/

UK/bˈʌf/

Definitions

01an enthusiast

B2 · Upper Intermediate Countable noun Informal

n. someone who is very interested in a particular subject and knows a lot about it.

n. an enthusiastic and knowledgeable admirer or aficionado of a specific subject.

“My uncle is a real history buff who can name every king of England.”

“As a dedicated film buff, she spent her weekends scouring independent cinemas for rare 35mm prints of mid-century noir.”

02gaming enhancement

B2 · Upper Intermediate Countable noun Computing Slang

n. a change in a game that makes a character or weapon stronger.

n. an adjustment to game mechanics that increases the power or effectiveness of a specific element.

“The latest game update gave the archer a significant buff to its speed.”

“Players complained that the recent buff to the heavy tank class made competitive matches feel unbalanced and repetitive.”

Synonyms

Antonyms

03to polish

B2 · Upper Intermediate

v. to rub something with a soft cloth to make it shine.

v. to polish a surface using a soft material or a mechanical tool to achieve a high gloss.

“He spent the afternoon buffing the car until it looked brand new.”

“The jeweler carefully buffed the silver platter to remove the tarnish that had accumulated over decades of storage.”

Synonyms

polishshineburnish

Antonyms

scuffdull

04muscular

B2 · Upper Intermediate Informal

adj. having a strong, fit body with well-developed muscles.

adj. possessing a physically fit, toned, and muscular physique.

“He has been going to the gym every day and is looking very buff.”

“The lead actor spent six months training with a professional athlete to ensure he looked sufficiently buff for the superhero role.”

Antonyms

05nakedness

C1 · Advanced Uncountable noun Informal

n. used in the phrase 'in the buff' to mean wearing no clothes.

n. the state of being naked; almost exclusively used in the prepositional phrase 'in the buff'.

“The children were running around in the buff after their bath.”

“The artist's early sketches often depicted subjects in the buff, focusing on the natural contours of the human form without the distraction of drapery.”

Synonyms

Antonyms

Usage

Typically functions as the head of a compound noun phrase, preceded by the subject of interest (e.g., 'history buff', 'film buff').

Real-World Examples

“Car buffs will gladly dive into the details of nearly unlimited choice when buying a new one.”
The Independent 2 Oct 2026

Word family

NOUN

Buff(B2)

Idioms

Domain

Military

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.B2 FirstIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.5.5–6.5TOEFL 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: 4.0–4.572–94TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.785–944
Frequency
Frequent
Level
B2 · Upper Intermediate
Updated

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English Reference