from The American Heritage® Dictionary of the English Language, 5th Edition.

  • transitive verb To prevent from entering; keep out; bar.
  • transitive verb To prevent from being included, considered, or accepted; reject.
  • transitive verb To put out; expel.

from The Century Dictionary.

  • To shut out; debar from admission or participation; prevent from entering or sharing.
  • To except or reject, as from a privilege or grant, from consideration, etc.
  • To thrust out; eject; extrude.

from the GNU version of the Collaborative International Dictionary of English.

  • transitive verb To shut out; to hinder from entrance or admission; to debar from participation or enjoyment; to deprive of; to except; -- the opposite to admit
  • transitive verb To thrust out or eject; to expel.
  • transitive verb (logic) The name given to the third of the “three logical axioms,” so-called, namely, to that one which is expressed by the formula: “Everything is either A or Not-A.” no third state or condition being involved or allowed. See Principle of contradiction, under Contradiction.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • verb To bar (someone) from entering; to keep out.
  • verb To expel; to put out.
  • verb law, of evidence To refuse to accept as valid.
  • verb medicine To eliminate from diagnostic consideration.

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

  • verb prevent from being included or considered or accepted
  • verb put out or expel from a place
  • verb lack or fail to include
  • verb prevent from entering; keep out
  • verb prevent from entering; shut out


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

[Middle English excluden, from Latin exclūdere : ex-, ex- + claudere, to shut.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Latin excludere, from prefix ex- ("out"), + variant form of verb claudere ("close").



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  • In addition, exclude means to hatch or give birth to. "After Latin excludere ova. To draw, put or thrust forth from (a receptacle); to hatch (chickens, etc.); also fig.; to give birth to (young), to lay (eggs). Also †of the midwife: To extract. Const. from, out of" (OED).

    January 30, 2012