Main Entry: pre·pos·ter·ous
Pronunciation: \pri-ˈpäs-t(ə-)rəs\
Function: adjective
Etymology: Latin praeposterus, literally, in the wrong order, from prae- + posterus hinder, following — more at posterior
Date: 1542
: contrary to nature, reason, or common sense : absurd
— pre·pos·ter·ous·ly adverb
— pre·pos·ter·ous·ness noun