short

If something is short then there is a small distance from the bottom to the top. The opposite is tall.

Example: I can't reach the table because I'm too short.

If something is short then there is a small distance from the one end to the other. The opposite is long.

Example: The more I use the pencil, the shorter it becomes.

If something is short then it takes a little time.

Example: I'm going to Chengdu for a short break.

Short of (doing) sth is equal to except (doing) sth.

Example: Nothing short of help from god will save him.

If you're running short of something, you don't have enough.

Example: We're running short of time, so can you hurry up?