Emily Dickinson Lexicon

SO-LIL'O-QUY, n. [Fr. soliloque; It. and Sp. soliloquio; L. solus, alone, and loquor, speak.]

1. A talking to one's self; a talking or discourse of a person alone, or not addressed to another person, even when others are present. Lovers are always allowed the comfort of soliloquy. – Spectator.
2. A written composition, reciting what it is supposed a person speaks to himself. The whole poem is a soliloquy. – Prior.