Meaning of TRAP in English

TRAP

( n. )

An old term rather loosely used to designate various dark-colored, heavy igneous rocks, including especially the feldspathic-augitic rocks, basalt, dolerite, amygdaloid, etc., but including also some kinds of diorite. Called also trap rock.

Webster's Revised Unabridged English Dictionary.      Пересмотренный полный словарь английского языка Webster.