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

  • adj. Not moving or flowing; motionless.
  • adj. Foul or stale from standing: stagnant ponds.
  • adj. Showing little or no sign of activity or advancement; not developing or progressing; inactive: a stagnant economy.
  • adj. Lacking vitality or briskness; sluggish or dull: a stagnant mind.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Lacking freshness, motion, flow, progress, or change; stale; motionless; still.

from the GNU version of the Collaborative International Dictionary of English

  • adj. That stagnates; not flowing; not running in a current or steam; motionless; hence, impure or foul from want of motion
  • adj. Not active or brisk; dull.

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

  • adj. not growing or changing; without force or vitality
  • adj. not circulating or flowing


Latin stāgnāns, stāgnant-, present participle of stāgnāre, to be stagnant; see stagnate.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From French stagnant, from Latin stagnans, present participle of stagno ("to form a pool of standing water") (Wiktionary)



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