mum mum /ˈmʌm/

adjective

1. () Failing to speak or communicate etc when expected to  ( mum , silent )
   failing to speak or communicate etc when expected to
    The witness remained silent
   the witness remained silent
   

noun

1. Secrecy  ( mum )
   secrecy
    Mum's the word
   mum's the word
   
2. Informal terms for a mother  ( mammy , mom , momma , ma , mama , mamma , mommy , mum , mummy )
   informal terms for a mother
     Ma lovingly cared for her children, ensuring their well-being.
   Ma lovingly cared for her children, ensuring their well-being.
   
3. Of China  ( Chrysanthemum morifolium , Dendranthema grandifloruom , florist's chrysanthemum , florists' chrysanthemum , mum )
   of China