mum

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1 mum /ˈmʌm/ adjective
1 mum
/ˈmʌm/
adjective
Learner's definition of MUM
informal
: not talking about something

mum's the word

informal
used to say that some information is being kept secret or should be kept secret
2 mum /ˈmʌm/ noun
plural mums
2 mum
/ˈmʌm/
noun
plural mums
Learner's definition of MUM
[count] US
3 mum /ˈmʌm/ noun
plural mums
3 mum
/ˈmʌm/
noun
plural mums
Learner's definition of MUM
[count] British, informal
: mother, mom
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