The meaning of DUMB is lacking intelligence : stupid. How to use dumb in a sentence. Usage of Dumb: Usage Guide Synonym Discussion of Dumb. 【Fukase】'Cause I'm a Liar (Kokichi Oma fan song) 【VOCALOID Original】 +VSQX stupid, dull, dense, crass, dumb mean lacking in power to absorb ideas or impressions. stupid implies a slow-witted or dazed state of mind that may be either congenital or temporary. Today, most of the time someone or something is described as dumb when it shows a lack of thought, like your dumb idea of wearing flip-flops in a snowstorm.
