Pronunciation: (trī-lem'u), [key]
1. a situation, analogous to a dilemma, in which there are three almost equally undesirable alternatives: His trilemma consisted in not knowing whether to acknowledge receipt, deny it, or simply leave.
2. Logic.a form of argument in which three choices are presented, each of which is indicated to have consequences that may be unfavorable.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.