Definify.com
Webster 1913 Edition
Paronomasia
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Parˊo-no-ma′si-a
,Noun.
[L., fr. Gr. [GREEK], fr. [GREEK] to form a word by a slight change;
παρά
beside + [GREEK] to name, fr. ὄνομα
a name.] (Rhet.)
A play upon words; a figure by which the same word is used in different senses, or words similar in sound are set in opposition to each other, so as to give antithetical force to the sentence; punning.
Dryden.