1.
see stand 1, 2
2.
If something such as a claim or a piece of evidence stands up, it is accepted as true or satisfactory after being carefully examined.
He made wild accusations that did not ~...
How well does this thesis ~ to close examination?
PHRASAL VERB: V P, V P to n
3.
If a boyfriend or girlfriend stands you up, they fail to keep an arrangement to meet you. (INFORMAL)
We were to have had dinner together yesterday evening, but he stood me up...
PHRASAL VERB: V n P