Definition of -ous

1 : full of : abounding in : having : possessing the qualities of clamorous poisonous
2 : having a valence lower than in compounds or ions named with an adjective ending in -ic mercurous

History and Etymology for -ous

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

Keep scrolling for more

Learn More about -ous

Statistics for -ous

Cite this Entry

“-ous.” Dictionary, Merriam-Webster, Accessed 16 May. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

Keep scrolling for more

More Definitions for -ous

English Language Learners Definition of -ous

: full of : having a large amount of : having the quality of
\ əs \

Kids Definition of -ous

: full of : having : resembling dangerous poisonous

Comments on -ous

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


Test Your Vocabulary

Words Used by Nabokov Quiz

  • image1676440788
  • Choose the best definition or synonym for the word in bold: "There are some eructations that sound like cheers—at least, mine did." Lolita
Spell It

Can you spell these 10 commonly misspelled words?

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!