1. Slow to learn or understand; lacking intellectual acuity
   "dumb officials make some really dumb decisions"
   - dense, dim, dull, obtuse, slow 
2. Temporarily incapable of speaking
   "struck dumb"
   - speechless 
3. Lacking the power of human speech
   "dumb animals" 
4. Unable to speak because of hereditary deafness
   - mute, silent

1. Make simpler and less intellectually challenging (in a negative sense)
   - dumb down

Derived forms: dumbing, dumbest, dumbs, dumber, dumbed

See also: dumbly, dumbness, inarticulate, stupid, unarticulate

Encyclopedia: Dumb

• standing order
• standing ovation
• standing press
• standing rib roast
• standing room
• standing stone
• standing wave
• Standish
• standoff
• standoffish
• standoffishly
• standoffishness
• standpat
• standpipe
• standpoint
• standstill
• standup comedian
• stane
• Stanford
• Stanford University
• Stanford White
• Stanford-Binet test
• stanhope
• stanhopea
• Stanislavsky