Definition from Wiktionary, the free dictionary
- To affix a notice, announcement etc, to a post, board, wall or the like.
- If the bailiff does not find the witness at his home, he will post up a court warrant there instead.
- To enter any information, data etc (into a register, account, record etc).
- (basketball) To establish a position in the frontcourt on one side or the other of the free throw lane, especially used against smaller defenders.