obnoxious

adjective

ob·​nox·​ious äb-ˈnäk-shəs 

əb-

1

: odiously or disgustingly objectionable : highly offensive

an obnoxious odor

made some really obnoxious remarks

wedding guests being loud and obnoxious

2

archaic : exposed to something unpleasant or harmful

—used with to

3

archaic : deserving of censure

obnoxiously adverb

obnoxiousness noun

Synonyms of obnoxious

• ugly
• disgusting
• awful
• horrible
• hideous
• sickening
• obscene
• offensive
• shocking
• nasty
• dreadful
• unpleasant

Examples of obnoxious in a Sentence

Let's get right into it. The title of your book, Why We Suck, is pretty obnoxious. Are we really that bad? —Rachel Deahl, Boston Globe, 30 Nov. 2008

"Not to sound obnoxious, but this downturn could be good for us," says Max Levchin, founder and CEO of Slide, in San Francisco. "Some of our competitors are going to go out of business." —Daniel Lyons, Newsweek, 20 Oct. 2008

Now that many large cities are surrounded by Stygian fields of concrete tedium, urban sprawl looks like an obnoxious side effect of prosperity and decline. —Graham Robb, The Discovery of France, 2007

The teller's eyes widened as a customer poured thousands of pennies onto the counter, an intentionally obnoxious way to pay a high heating bill. —Erik Eckholm, New York Times, 26 June 2006

He said some really obnoxious things about his ex-girlfriend at the party.

Some teenagers were being loud and obnoxious.

Recent Examples on the Web

In this, the second-to-last time Friends would celebrate November’s most gluttonous holiday, Rachel’s obnoxious sister Amy (Christina Applegate) invites herself to Thanksgiving, and the conversation turns to who would get custody of baby Emma if Rachel and Ross died. —Brian Boone, Vulture, 26 Nov. 2025

In the best Scrooge tradition, Brad — a three-time Razzie Award nominee who at the story’s beginning is filming the seventh installment of his cheesy action movie series Killing Time — is an obnoxious blowhard who hits on his married co-star and refuses to do his own stunts. —Frank Scheck, HollywoodReporter, 24 Nov. 2025

The tech package is impressive without being obnoxious. —Kevin Sintumuang, Outside, 18 Nov. 2025

So how will Stevie, who shares a bedroom with her obnoxious little brother, Elliot (Elias Janssen), keep the family together? —Owen Gleiberman, Variety, 9 Nov. 2025

Word History

Etymology

Latin obnoxius "under obligation, subservient, liable, exposed to, vulnerable" (of uncertain origin) + -ous

Note: Latin obnoxius has traditionally been taken to be a parasynthetic derivative from the phrase ob noxiam "due to wrongdoing, on account of bad behavior" (see noxious), but this explanation does not account for the primary senses of the word. Ernout and Meillet (Dictionnaire étymologique de la langue latine) take -noxius as a desiderative derivative from the base of nancīscī "to acquire" (see enough entry 1), parallel to anxius "worried"/angere "to strangle, distress" (see anxious), alsius "liable to injury from cold"/algēre "to be cold." The English sense "objectionable" is probably due to influence of noxious and its etymon, Latin noxius.

First Known Use

1597, in the meaning defined at sense 2

Rhymes for obnoxious

• noxious

Kids Definition

obnoxious

adjective

ob·​nox·​ious äb-ˈnäk-shəs 

əb-

: very disagreeable or offensive

obnoxiously adverb

obnoxiousness noun