stand up

US /stænd ˈʌp/
UK /stænd ˈʌp/
"stand up" picture
1.

to rise to one's feet

:
Please stand up when the judge enters the courtroom.
He was too weak to stand up.
2.

to defend oneself or one's beliefs against attack or criticism

:
You need to stand up for what you believe in.
She always stands up to bullies.
3.

to remain valid or effective

:
The contract will stand up in court.
His alibi didn't stand up to scrutiny.