stand for something phrasal verb ( see also ↑ stand )
1 . if a letter or symbol stands for something, it represents a word or idea, especially as a short form:
What does ATM stand for?
2 . to support a particular set of ideas, values, or principles:
It’s hard to tell what the party stands for these days.
3 . not stand for something British English to not allow something to continue to happen or someone to do something:
She’s been lying about me, and I won’t stand for it.