odor

[oh-der]
noun
1.
the property of a substance that activates the sense of smell: to have an unpleasant odor.
2.
a sensation perceived by the sense of smell; scent.
3.
an agreeable scent; fragrance.
4.
a disagreeable smell.
5.
a quality or property characteristic or suggestive of something: An odor of suspicion surrounded his testimony.
6.
repute: in bad odor with the whole community.
7.
Archaic. something that has a pleasant scent.
Also, especially British, odour.


Origin:
1250–1300; Middle English < Old French < Latin

odorful, adjective
odorless, adjective


3. aroma, redolence, perfume. Odor, smell, scent, stench all refer to sensations perceived through the nose by the olfactory nerves. Odor and smell in literal contexts are often interchangeable. Figuratively, odor also usually occurs in positive contexts: the odor of sanctity. Smell is the most general and neutral of these two terms, deriving connotation generally from the context in which it is used: the tempting smell of fresh-baked bread; the rank smell of rotting vegetation. In figurative contexts smell may be either positive or negative: the sweet smell of success; a strong smell of duplicity pervading the affair. Scent refers either to delicate and pleasing aromas or to faint, barely perceptible smells: the scent of lilacs on the soft spring breeze; deer alarmed by the scent of man. Stench is strongly negative, referring both literally and figuratively to what is foul, sickening, or repulsive: the stench of rotting flesh; steeped in the stench of iniquity and treason.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
odor (ˈəʊdə)
 
n
the US spelling of odour
 
'odorless
 
adj

odour or odor (ˈəʊdə)
 
n
1.  the property of a substance that gives it a characteristic scent or smell
2.  a pervasive quality about something: an odour of dishonesty
3.  repute or regard (in the phrases in good odour, in bad odour)
 
[C13: from Old French odur, from Latin odor; related to Latin olēre to smell, Greek ōzein]
 
odor or odor
 
n
 
[C13: from Old French odur, from Latin odor; related to Latin olēre to smell, Greek ōzein]
 
'odourless or odor
 
adj
 
'odorless or odor
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

odor
c.1300, from Anglo-Fr. odour, from O.Fr. odor (Fr. odeur), from L. odorem (nom. odor) "smell, scent," from PIE *od- (cf. L. olere "emit a smell, to smell of," with Sabine -l- for -d-; Gk. ozein "to smell;" Armenian hotim "I smell;" Lith. uodziu "to smell"). Odorous "fragrant" (1550) is from M.L. odorosus,
from L. odorus "having a smell," from odor. Good or bad odor, in ref. to repute, estimation, is from 1835. Odor of sanctity (1756) is from Fr. odeur de sainteté (17c.) "sweet or balsamic scent said to be exhaled by the bodies of eminent saints at death or upon disinterment."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

odor o·dor (ō'dər)
n.

  1. The property or quality of a thing that affects, stimulates, or is perceived by the sense of smell.

  2. A sensation, stimulation, or perception of the sense of smell.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences for odorless
As it is colourless and odorless, it has been described as very easy to add to drinks.
Reactions on oxidation, benzaldehyde is converted into the odorless benzoic acid.
It is formed by incomplete combustion, and is a colorless, odorless gas.
Synonyms
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