(slang, law enforcement) Perpetrator.

(architecture) Clipping of perpendicular.

plural of perp

(chiefly US, idiomatic, law enforcement) The intentional public display before news cameras of someone in police custody, especially someone famous or notorious, for the purpose of satisfying public interest, demonstrating the authorities' effectiveness, or shaming the person.

plural of perp walk

(geometry) at or forming a right angle (to something). / Exactly upright; extending in a straight line toward the centre of the earth, etc. / Independent of or irrelevant to each other; orthogonal.

(geometry) A line or plane that is perpendicular to another. / A device such as a plumb line that is used in making or marking a perpendicular line.

One who perpetrates; especially, one who commits an offence or crime.

For an indefinitely long time / For life

The state or quality of being perplexed; puzzled or confused. / Something that perplexes. / In information theory, a measurement of how well a probability distribution or model predicts a sample.