1. (a.) Destitute of the power of speech; unable; to utter articulate sounds; as, the dumb brutes.

2. (a.) Not willing to speak; mute; silent; not speaking; not accompanied by words; as, dumb show.

3. (a.) Lacking brightness or clearness, as a color.

4. (v. t.) To put to silence.

Boeotian abiotic anaudic animal animalian animalic animalistic aphasic aphonic apish asinine awkward azoic batty beastlike beastly beef-brained beef-witted befooled beguiled besotted bestial blankminded blockheaded blockish bovine brainless breathless brief brusque brutal brute brutelike brutish buffoonish callow chumpish cloddish close close-tongued closemouthed cockeyed concise cowish crass crazy credulous curt daffy daft dazed dense dizzy doltish doting dull dullard dumbfounded dumbstricken dumbstruck duncical duncish economical of words empty empty-headed exanimate fat fatheaded fatuitous fatuous flaky fond fool foolheaded foolish fuddled futile gaga gauche goofy green groping gross gulled idiotic ignorant imbecile inane inanimate inanimated inarticulate incoherent indisposed to talk indistinct ineducable inept inert inexperienced infatuated innocent insane insensate insensible insentient instinctive instinctual klutzy know-nothing kooky laconic lifeless loony lumpish mad maudlin maundering mindless moronic mum mute naive nescient nonconscious nonliving nonrational numskulled nutty oafish opaque quiet raw reticent sappy screwy senseless sentimental short silent silly simple snug sottish soulless sparing of words speechless strange to stricken dumb stupid subhuman taciturn tentative terse thick thick-witted thoughtless tight-lipped tongue-tied tongueless unacquainted unanimated unapprized uncommunicative uncomprehending unconscious unconversant unenlightened unfamiliar unfeeling unilluminated uninformed uninitiated unintelligent unknowing unloquacious unposted unripe unsure untalkative unteachable unversed vacuous voiceless wacky wet witless word-bound wordless wrongheaded zoic zooidal zoologic