English Reference

Word

odor

/ˈoʊdɝ/

UK spelling · odour

Definitions

01a smell

B2

n. a smell, especially one that is strong or easy to notice.

n. a distinctive smell, whether pleasant or unpleasant, though often used for strong or chemical scents.

“The strong odor of cleaning chemicals filled the hospital hallway.”

“The investigators noticed a faint, metallic odor lingering in the laboratory, suggesting that a chemical reaction had recently taken place.”

American English

Usage

Commonly used in scientific or medical contexts to describe neutral or unpleasant smells.

Pitfall

The flower has a beautiful odor.

The flower has a beautiful scent.

While 'odor' can mean any smell, it is usually used for neutral or bad smells. For flowers or perfume, use 'scent' or 'aroma'.

Synonyms

02body smell

B2

n. the natural smell of a person's body, especially when they have been sweating.

n. the characteristic smell of a human body, typically used in the compound 'body odor' (BO).

“He used deodorant every morning to prevent body odor.”

“The locker room was thick with the pungent odor of sweat and damp towels after the championship game.”

American English

Usage

Often abbreviated to 'BO' in informal speech.

Synonyms

body odorsweat

03reputation or favor

C2

n. the way people think about you; your reputation.

n. the state of being held in a certain level of esteem or favor, usually in the phrase 'in bad odor'.

“The politician was in bad odor with the public after the scandal.”

“Following the failed merger, the CEO found himself in particularly bad odor with the board of directors.”

Formal · Literary

Teaching tip

This sense is almost exclusively used in the idiom 'in bad odor with someone', meaning to be in trouble or disliked by them.

Real-World Examples

“Do not rely on appearance or odor to judge safety.”
The Conversation · 11 Aug 2026

Etymology

From Middle English odour, borrowed from Anglo-Norman odour, from Old French odor, from Latin odor. Cognates * Swedish odör (“bad smell”)

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Idioms

in bad odor — Regarded with disapproval; in a situation of being disliked; shunned.

in good odor — liked, in someone's good books.

This entry

Level
B2 · Upper Intermediate
Frequency
Frequent
Updated

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English Reference