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

  • transitive v. To push or thrust outward.
  • intransitive v. To jut out; project. See Synonyms at bulge.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • v. To extend from, above or beyond a surface or boundary; to bulge outward; to stick out.

from the GNU version of the Collaborative International Dictionary of English

  • intransitive v. To shoot out or forth; to be thrust forward; to extend beyond a limit; to project.
  • transitive v. To thrust forward; to drive or force along.
  • transitive v. To thrust out, as through a narrow orifice or from confinement; to cause to come forth.

from The Century Dictionary and Cyclopedia

  • To thrust forward or onward; drive or force along.
  • To shoot or thrust forth; project; cause to project; thrust out as from confinement; cause to come forth: as, a snail protrudes its horns.
  • To shoot forward; be thrust forward; project beyond something.
  • Synonyms To project, jut (out), bulge (out).

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

  • v. swell or protrude outwards
  • v. extend out or project in space
  • v. bulge outward


Latin prōtrūdere : prō-, forward; see pro-1 + trūdere, to thrust; see treud- in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin prōtrūdō, prōtrūdere. (Wiktionary)



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