Source : Webster's Revised Unabridged Dictionary (1913)

Lesbian \Les"bi*an\ (l[e^]s"b[i^]*an), a.
   Of or pertaining to the island anciently called Lesbos, now
   Mitylene, in the Grecian Archipelago.

Lesbian \Les"bi*an\, a.
   Amatory; erotic; -- in allusion to the reputed sensuality of
   the Lesbian people and literature; as, Lesbian novels.

Source : WordNet®

lesbian
     adj : of female homosexuality [syn: {sapphic}]

lesbian
     n 1: a female homosexual [syn: {tribade}, {gay woman}]
     2: a resident of Lesbos