Hypertext Webster Gateway: "Noun"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Noun \Noun\, n. [OF. noun, nun, num, non, nom, F. nom, fr. L.
nomen name. See {Name}.] (Gram.)
A word used as the designation or appellation of a creature
or thing, existing in fact or in thought; a substantive.
Note: By some grammarians the term noun is so used as to
include adjectives, as being descriptive; but in
general it is limited to substantives.
From WordNet (r) 1.7 (wn)
noun
n 1: a word that can be used to refer to a person or place or
thing
2: a word that can serve as the subject or object of a verb
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