1.Definition: arousing or provoking laughter

"It would have been laughable if it hadn't hurt so much"

Related Adjective(s):amusing, comic, comical, funny, mirthful, risible

2.Definition: so unreasonable as to invite derision

"A contribution so small as to be laughable"

Related Adjective(s):absurd, cockeyed, derisory, idiotic, ludicrous, nonsensical, preposterous, ridiculous