adjective suffix

Definition of -ous

  1. 1 :  full of :  abounding in :  having :  possessing the qualities of clamorous poisonous

  2. 2 :  having a valence lower than in compounds or ions named with an adjective ending in -ic mercurous

Origin and Etymology of -ous

Middle English, from Anglo-French -us, -ous, from Latin -osus

-OUS Defined for English Language Learners


adjective suffix

Definition of -ous for English Language Learners

  • : full of : having a large amount of : having the quality of

Seen and Heard

What made you want to look up -ous? Please tell us where you read or heard it (including the quote, if possible).


feeling or affected by lethargy

Get Word of the Day daily email!