antiphrasis

English Thesaurus

1. the use of a word in a sense opposite to its normal sense (especially in irony) (noun.communication)

hypernym	:	rhetorical device,
definition	:	a use of language that creates a literary effect (but often without regard for literal significance) (noun.communication)

part meronym	:	irony,
definition	:	a trope that involves incongruity between what is expected and what occurs (noun.communication)