odor

noun

ˈō-dər 

1

a

: a quality of something that stimulates the olfactory organ : scent

b

: a sensation resulting from adequate stimulation of the olfactory organ : smell

2

a

: a characteristic or predominant quality : flavor

the odor of sanctity

b

: repute, estimation

in bad odor

3

archaic : something that emits a sweet or pleasing scent : perfume

odored

ˈō-dərd 

adjective

odorless

ˈō-dər-ləs 

adjective

Synonyms of odor

• smell
• aura
• aroma
• atmosphere
• air
• flavor

Choose the Right Synonym for odor

smell, scent, odor, aroma mean the quality that makes a thing perceptible to the olfactory sense.

smell implies solely the sensation without suggestion of quality or character.

an odd smell permeated the room

scent applies to the characteristic smell given off by a substance, an animal, or a plant.

the scent of lilacs

odor may imply a stronger or more readily distinguished scent or it may be equivalent to smell.

a cheese with a strong odor

aroma suggests a somewhat penetrating usually pleasant odor.

the aroma of freshly ground coffee

Examples of odor in a Sentence

The cheese has a strong odor.

This deodorant prevents bad odor from occurring.

Recent Examples on the Web

The breeze would spread the sweetish odor of death through the forest and the animals would take care of the rest. —Literary Hub, 12 Jan. 2026

Participants were able to detect odorant molecules using the device, and most could reliably distinguish between different odors. —New Atlas, 12 Jan. 2026

Some of the specific issues with Jonah in this firing scene are his odor and his hygiene. —Roxana Hadadi, Vulture, 12 Jan. 2026

And, to avoid odors, empty and wash the trashcan. —Mary Marlowe Leverette, The Spruce, 12 Jan. 2026

Word History

Etymology

Middle English odour, borrowed from Anglo-French odur, borrowed from Latin odor (early Latin odōs), going back to *od-os-, s-stem derivative of a verbal base *od- (whence Latin oleō, olēre, also olō, olere "to give off a smell, smell (of)," from *odere), going back to Indo-European *h₃ed-, whence Greek ózein "to smell, give off an odor," Armenian hot "smell, odor" (probably also an s-stem), Lithuanian úodžiu, úosti "to smell, sniff"

Note: The length in the Baltic form is attributed to Winter's Law, which is believed to lengthen vowels before an original voiced, unaspirated stop in Baltic and Slavic in certain environments.

First Known Use

13th century, in the meaning defined at sense 1a

Phrases Containing odor

• body odor

Rhymes for odor

• coder
• loader
• odour
• decoder
• encoder
• unloader

Kids Definition

odor

noun

ˈōd-ər 

: the quality of something that stimulates the sense of smell : scent

also : a sensation resulting from such stimulation

odorless

-ləs 

adjective

Medical Definition

odor

noun

variants or chiefly British odour

ˈōd-ər 

1

: a quality of something that stimulates the olfactory organ : smell

2

: a sensation resulting from adequate chemical stimulation of the olfactory organ

a disagreeable odor

odored adjective

or chiefly British odoured

odorless adjective

or chiefly British odourless