Learner's definition of MUM
informal
: not talking about something沉默的 -
I'd like to know how much they paid, but they've been mum on that subject.我想知道他们付了多少钱,但是他们一直对此三缄其口。
-
She told him to keep/stay mum about the project. [=she told him not to tell anyone about the project]她告诫他关于项目的事要保密。
mum's the word
informal
—
used to say that some information is being kept secret or should be kept secret要保密 2 mum /ˈmʌm/ noun
plural mums
plural mums
Learner's definition of MUM
[count] US
3 mum /ˈmʌm/ noun
plural mums
plural mums
Learner's definition of MUM
[count] British, informal