From Longman Dictionary of Contemporary English ob‧nox‧ious /əbˈnɒkʃəs $ -ˈnɑːk-/ adjective very offensive, unpleasant, or rude She’s really obnoxious. an obnoxious idea obnoxious odours —obnoxiously adverb —obnoxiousness noun [uncountable] Examples from the Corpus obnoxious • And, and, oh, he wa...