Ex·clude v. t. [imp. & p. p. Excluded; p. pr. & vb. n. Excluding.]
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.
And none but such, from mercy I exclude. --Milton.
2. To thrust out or eject; to expel; as, to exclude young animals from the womb or from eggs.
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.