Middle English simplicite, from Anglo-French simplicité, from Latin simplicitat-, simplicitas, from simplic-, simplex
Date:
14th century
1: the state of being simple, uncomplicated, or uncompounded2 a: lack of subtlety or penetration :innocence, naivetéb:folly, silliness3: freedom from pretense or guile :candor4 a: directness of expression :clarityb: restraint in ornamentation :austerity