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Synonyms

obnoxious

American  
[uhb-nok-shuhs] / əbˈnɒk ʃəs /

adjective

  1. highly objectionable or offensive; odious.

    obnoxious behavior.

    Antonyms:
    delightful
  2. annoying or objectionable due to being a show-off or attracting undue attention to oneself.

    an obnoxious little brat.

  3. Archaic. exposed or liable to harm, evil, or anything objectionable.

  4. Obsolete. liable to punishment or censure; reprehensible.


obnoxious British  
/ əbˈnɒkʃəs /

adjective

  1. extremely unpleasant

  2. obsolete exposed to harm, injury, etc

"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

Related Words

See hateful.

Other Word Forms

Etymology

Origin of obnoxious

First recorded in 1575–85; from Latin obnoxiōsus “harmful,” equivalent to ob- “to, toward, against,” + noxiōsus “harmful”; see ob-, noxious

Explanation

If something is obnoxious, it's annoying and unpleasant. Generally, people like to avoid obnoxious folks. If something is driving you absolutely crazy, it's probably obnoxious. Yelling and stomping your feet is obnoxious. Poking someone repeatedly is obnoxious. Driving like a maniac is obnoxious. If the teacher comes in and finds students jumping up and down and throwing books, she might say, "Stop being so obnoxious!" Any time someone is obnoxious, someone else probably wants them to stop it.

Keep Reading on Vocabulary.com

Vocabulary lists containing obnoxious

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Obnoxious guests, secrets and lies: that's right, The White Lotus is back.

From BBC • Feb. 16, 2025

Obnoxious: “Your problem is you’re not flexible at all.”

From Washington Post • Apr. 13, 2023

Tenuta grew up in the Chicago suburb of Maywood, attending Catholic schools that included one she dubbed “St. Obnoxious and Bondage.”

From Washington Times • Oct. 6, 2022

Obnoxious relatives and neighbors wear out their welcome in the new home of a yuppie couple.

From Los Angeles Times • Mar. 27, 2020

“Queen Obnoxious and the Grade-A Jerk,” I said.

From "Glitch" by Laura Martin