— antiphrastic /an'ti fras"tik/ , antiphrastical , adj. — antiphrastically , adv.
/an tif"reuh sis/ , n. Rhet.
the use of a word in a sense opposite to its proper meaning.
[ 1525-35; antiphrázein to speak the opposite ( anti- ANTI- + phrázein to speak); see PHRASE, SIS ]