[ naw-shuhs, -zee-uhs ]
/ ˈnɔ ʃəs, -zi əs /


affected with nausea; nauseated: to feel nauseous.
causing nausea; sickening; nauseating.
disgusting; loathsome: a nauseous display of greed.

Origin of nauseous

From the Latin word nauseōsus, dating back to 1595–1605. See nausea, -ous

Related forms

nau·seous·ly, adverbnau·seous·ness, noun

Can be confused

nauseated nauseous (see usage note at the current entry)

Usage note

The two literal senses of nauseous, “causing nausea” ( a nauseous smell ) and “affected with nausea” ( to feel nauseous ), appear in English at almost the same time in the early 17th century, and both senses are in standard use at the present time. Nauseous is more common than nauseated in the sense “affected with nausea,” despite recent objections by those who imagine the sense to be new. In the sense “causing nausea,” either literally or figuratively, nauseating has become more common than nauseous : a nauseating smell. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for nauseous

British Dictionary definitions for nauseous


/ (ˈnɔːzɪəs, -sɪ-) /


feeling sick
causing nausea
distasteful to the mind or senses; repulsive

Derived Forms

nauseously, adverbnauseousness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for nauseous


[ nôshəs, -zē-əs ]


Causing nausea.
Affected with nausea.

Related forms

nauseous•ly adv.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.