To pull (something) back, aside, or away.
To stop talking to, or interacting with, other people and start thinking thoughts that are not related to what is happening around.
To take back (a comment, etc); retract.
To remove, to stop providing (one's support, etc); to take out of service.
To extract (money from an account).
To retreat.
To be in withdrawal from an addictive drug etc.
Removed from circulation
Introverted; not inclined to interact with other people