Definitions:

1. lacking the power of human speech adjective
   • dumb animals
2. temporarily incapable of speaking adjective
   • struck dumb

Synonyms:

• mute
• silent
• slow
• speechless

NearBy Words:

• dumbass
• dumbbell
• dumbfound
• dumbfounded
• dumbfounding
• dumbly
• dumbness
• dumbstricken
• dumbstruck
• dumbwaiter