causing laughter because of absurdity; provoking or deserving derision; ridiculous; laughable: a ludicrous lack of efficiency.
Origin: 1610–20; < Latinlūdicrus sportive, equivalent to lūdicr(um) a show, public games (lūdi-, stem of lūdere to play, + -crum noun suffix of instrument or result) + -us-ous
1619, "pertaining to play or sport," from L. ludicrus, from ludicrum "source of amusement, joke," from ludere "to play," which, with L. ludus "a game, play," may be from Etruscan, or from a PIE base *leid- "to play." Sense of "ridiculous" is attested from 1782.