I. | ̷ ̷ ̷ ̷| ̷ ̷ adjective
Etymology: from the phrase third degree
: of a degree next to the second ; specifically : of a degree of criminal culpability or seriousness second after first-degree
third-degree arson
II. transitive verb
Etymology: third degree
: to administer the third degree to
the police beat prisoners and third-degree them — Newsweek