TRAP (2)

trap (2). Trap, v.t. to insnare, catch, take, adorn, dress

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Trap, n. [[Sw. trapp; akin to trappa stairs, Dan. trappe, G. treppe, D. trap; — so called because the rocks of this class often occur in large, tabular masses, rising above one another, like steps. See Tramp.]] (Geol.) 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. Trap tufa, Trap tuff, a kind of fragmental rock made up of fragments and earthy materials from trap rocks.