Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

WORD ORIGIN

"a bursting inward," 1829, modeled on explosion, with assimilated form of in- "into, in, on, upon" (see in- (2)).

In early use often in reference to effect of deep sea pressures, or in phonetics. Figurative sense is by 1960.

MORE RELATED WORDS FOR IMPLOSION

Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.