From The Collaborative International Dictionary of English v.0.48 [gcide]:
Exclude \Ex*clude"\, 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]
From WordNet (r) 3.0 (2006) [wn]:
exclude
v 1: prevent from being included or considered or accepted; "The
bad results were excluded from the report"; "Leave off the
top piece" [syn: exclude, except, leave out, {leave
off}, omit, take out] [ant: include]
2: prevent from entering; shut out; "The trees were shutting out
all sunlight"; "This policy excludes people who have a
criminal record from entering the country" [syn: exclude,
keep out, shut out, shut] [ant: admit, include,
let in]
3: lack or fail to include; "The cost for the trip excludes food
and beverages" [ant: include]
4: prevent from entering; keep out; "He was barred from
membership in the club" [syn: bar, debar, exclude]
5: put out or expel from a place; "The unruly student was
excluded from the game" [syn: eject, chuck out,
exclude, turf out, boot out, turn out]