i Register
In some senses, mum is marked as informal, archaic, obsolete, slang, dated. Watch for register when choosing this word.
noun
Mother.
From the Marvel Mixmaster to the Miracle Microwave, every time a new-fangled gadget has lobbed into the Aussie kitchen, Aussie mums have changed their cooking styles accordingly.
'Ooh Mum, Auntie don′t allow smokin’ - Pat′s eyes were round with awe as Mum struck a match.
noun
A chrysanthemum.
I don't know whether that's true or whether New Yorkers are being enjoined from watering the mums in their window boxes or whatever, but I do know that there hasn't been one rain-delay in the whole tournament so far […].
A decoration traditionally made of chrysanthemums and ribbons, worn by girls at high school homecoming celebrations, marked with indicators such as the wearer's name, school, the year, and so on.
adj
Silent.
The citizens are mum, and speak not a word.
[Vladimir Putin] has serious climate problems. And he has been mum on his willingness to do anything.
Secret.
“Come here, friend,” sternly from the doctor. “Now I give you the way inside if you’ll promise to keep it mum.”