Soliloquy1. (n.) The act of talking to one's self; a monologue; a discourse made by one in solitude to one's self; monologue.
2. (n.) A written composition, reciting what it is supposed a person says to himself.
Thesaurus Entries
a huis clos, all, apart, askance, askant, askew, aslant, aslope, asquint, away, awry, back, behind closed doors, beside, between the teeth, broadside, broadside on, by, crabwise, discursion, divagation, downgrade, downhill, each, edgeway, edgeways, edgewise, episode, excursion, excursus, glancingly, in a whisper, in an aside, in camera, in chambers, in executive session, in juxtaposition, in privacy, in private, in private conference, in privy, in reserve, infix, injection, insert, insertion, insinuation, intercalation, interjection, interlineation, interlocution, interpolation, introduction, januis clausis, laterad, laterally, monodrama, monologue, monology, nearby, nigh, obiter dictum, obliquely, on its side, on one side, on the beam, on the side, out of earshot, parenthesis, per, per capita, privately, privily, remark, right and left, round, side remark, sideling, sidelong, sideward, sidewards, sideway, sideways, sidewise, sidling, slant, slantingly, slantways, slantwise, slaunchways, slopeways, soliloquy, solo, sotto voce, to one side, to the side, tossing-in, wide apart, wide away, with bated breath