(mathematics) A linear algebra whose mathematical structure underlies a Lie group’s structure.

plural of Lie algebra

(intransitive) To conceal oneself; to remain hidden.

To be hiding, waiting to ambush or attack someone, or simply to accost them unexpectedly.

(informal) A polygraph, a device which measures and records several physiological variables such as blood pressure, heart rate, respiration and skin conductivity while a series of questions is being asked to a subject, in an attempt to detect lies.

(informal) The use of polygraphs during interrogation in an attempt to verify the truth or falsity of a subject's responses / (broadly) The use of any technique intended to detect deception.

plural of lie detector

Synonym of give the lie to

(idiomatic) To conceal something about oneself, without the knowledge of which others cannot know one's true character or perspective.

(idiomatic, intransitive or transitive) To respond to an insult, accusation, or falsehood by saying the offender is lying, particularly in the context of provoking a challenge to a duel.