(logic) A table showing all possible truth values for an expression, derived from the truth values of its components.

(physics, dated) Synonym of top quark.

(idiomatic) A deciding instant; the time when a test determines or makes it apparent whether something will succeed.

(idiomatic, euphemistic) Not telling the whole truth, especially in order to present a false image of a situation; untruthful; lying. Often used with sarcasm or satire.

(logic) A value indicating to what extent a statement is true; in classical logic, these are the values "true" and "false".

(games) A game where players take it in turn to perform a dare set by the other players, or truthfully answer a question put forth by them.

(games) The question asked during the truth or dare game, in which a player asks another player to choose between the two.

(mathematics, logic) A Boolean function whose value is interpreted as truth or falsity

A deceptive statement, especially one that is only partly true, is incomplete, misrepresents reality by telling part of the truth, or alters the time sequence of truths.

(idiomatic) A small amount of truth in a generally untrue statement.