Adjective
1. insanely irresponsible;
"an idiotic idea"2. completely devoid of wisdom or good sense;
"the absurd excuse that the dog ate his homework""that's a cockeyed idea""ask a nonsensical question and get a nonsensical answer""a contribution so small as to be laughable""it is ludicrous to call a cottage a mansion""a preposterous attempt to turn back the pages of history""her conceited assumption of universal interest in her rather dull children was ridiculous"3. having a mental age of three to seven years