from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Yielding or containing plenty; affording ample supply: a copious harvest. See Synonyms at plentiful.
  • adj. Large in quantity; abundant: copious rainfall.
  • adj. Abounding in matter, thoughts, or words; wordy: "I found our speech copious without order, and energetic without rules” ( Samuel Johnson).

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Great in quantity or number, profuse, abundant; taking place on a large scale.
  • adj. Having an abundant supply.
  • adj. Full of thought, information, or matter; exuberant in words, expression, or style.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Large in quantity or amount; plentiful; abundant; fruitful.

from The Century Dictionary and Cyclopedia

  • Abundant; plentiful; ample; large in quantity or number: as, copious supplies; a copious feast; copious notes of a lecture; copious rain.
  • Exhibiting abundance or fullness, as of thoughts or words.
  • Having an abundant supply; abounding; plenteous; liberal.
  • Synonyms Ample, Copious, Plenteous (see ample), rich, full, exuberant, overflowing, profuse.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. affording an abundant supply
  • adj. large in number or quantity (especially of discourse)


from The American Heritage® Dictionary of the English Language, 4th Edition

Middle English, from Latin cōpiōsus, from cōpia, abundance; see op- in Indo-European roots.

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Middle English, from Latin copiosus, copia ("abundance"), from Latin co- + ops ("wealth") + -osus ("full of").



Log in or sign up to get involved in the conversation. It's quick and easy.

  • adjective: in abundant supply

    In midsummer, there are copious popsicle stands at the beach; in the winter, there are none.

    October 19, 2016

  • I hate this word. It's very condescending, and it pisses me off.

    August 15, 2007

  • I hear this word most often in terms of copious amounts of alcohol.

    December 19, 2006

  • Hail Son of God, Saviour of Men, thy Name

    Shall be the copious matter of my Song ...

    Milton, Paradise Lost III

    December 19, 2006