Hold out

1. to wait, or refuse in hopes of getting something better (from a negotiation, etc.)

   I am holding out for more money.

2. to survive, endure

   How long can they hold out without water?

3. to hold something out; to extend forward

   Hold out your hand.

4. to keep a secret; withhold information (often hold out on)

   I didn't know you could do that. Have you been holding out on me?

5. to set something aside or save it for later

   Pack the boxes, but hold out a few blue ones for later.