an adjectival suffix with the meanings “composed of,” “resembling, having the nature of,” occurring in loanwords from Latin (igneous; ligneous; vitreous); also, as a semantically neutral suffix, found on adjectives of diverse origin, sometimes with corresponding nouns ending in -ty2 (beauteous; courteous; hideous; homogeneous; plenteous; righteous).

Nearby words

  1. -ene,
  2. -enne,
  3. -enoic,
  4. -ensis,
  5. -ent,
  6. -er,
  7. -erel,
  8. -ergic,
  9. -ern,
  10. -eroo

Origin of -eous

< Latin -eus; see -ous

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for -eous


suffix forming adjectives

relating to or having the nature ofgaseous Compare -ious

Word Origin for -eous

from Latin -eus

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