(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.

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.

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

plural of half-truth

(idiomatic) A core accuracy at the heart of a claim or narrative which also contains dubious or fictitious elements.

(informal, medicine) A psychoactive medication, especially one administered by injection, which supposedly renders a person cooperative and disposed to respond honestly to questions.

Synonym of truth serum