v. t. [ imp. & p. p. Excluded; p. pr. & vb. n. Excluding. ] [ L. excludere, exclusum; ex out + claudere to shut. See Close. ] 1. To shut out; to hinder from entrance or admission; to debar from participation or enjoyment; to deprive of; to except; -- the opposite to admit; as, to exclude a crowd from a room or house; to exclude the light; to exclude one nation from the ports of another; to exclude a taxpayer from the privilege of voting. [ 1913 Webster ]

And none but such, from mercy I exclude. Milton. [ 1913 Webster ]

2. To thrust out or eject; to expel; as, to exclude young animals from the womb or from eggs. [ 1913 Webster ]

Excluded middle. (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. [ 1913 Webster ]