adj. 25B6; adjective
a playful mood : FRISKY, jolly, lively, full of fun, sportive, high-spirited, exuberant, perky; mischievous, impish, rascally, tricksy; informal full of beans; poetic/literary frolicsome; dated gay; formal ludic.
a playful remark : LIGHT-HEARTED, in jest, joking, jokey, teasing, humorous, jocular, good-natured, tongue-in-cheek, facetious, frivolous, flippant, arch; informal waggish.
serious.