Dictionary and Thesaurus

Definition of Keep Mum

• (verb) refuse to talk or stop talking; fall silent; "The children shut up when their father approached"

Synonyms of Keep Mum

• Close Up
• Clam Up
• Dummy Up
• Shut Up
• Belt Up
• Button Up
• Be Quiet

Antonyms of Keep Mum

• Open Up

Homophones of Keep Mum