Tri*lem"ma (?), n. [NL., fr. Gr. (see Tri-) + any thing received, in logic, an assumption. Cf. Dilemma.]
1. Logic
A syllogism with three conditional propositions, the major premises of which are disjunctively affirmed in the minor. See Dilemma.
2.
A state of things in which it is difficult to determine which one of three courses to pursue.
© Webster 1913.