Meaning of the word "button up" in English

What does "button up" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

button up

US /ˈbʌt.n̩ ʌp/
UK /ˈbʌt.n̩ ʌp/
"button up" picture

Phrasal Verb

1.

to fasten all the buttons on a piece of clothing

Example:
It's cold outside, so make sure to button up your coat.
He buttoned up his shirt before the interview.
2.

to stop talking or keep a secret

Example:
You need to button up and stop gossiping about others.
The witness buttoned up when the police started asking questions.