stand for someone—rise to one’s feet as a mark of respect for a person:
- Will all present in court stand for the judge.
stand up for someone—
1. defend smb. who is being attacked; give one’s support to a person:
- One should always stand up for the weak and oppressed.
2. (also: stand up with someone) act as groomsman or bridesmaid at smb.’s wedding:
- I was honored when Jim asked me to stand up for him at his wedding to Mary.
See also: stand up to someone / stand up with someone.