retreat (Noun) — (military) withdrawal of troops to a more favourable position to escape the enemy's superior forces or after a defeat. ex. "the disorderly retreat of French troops"
retreat (Noun) — A place of privacy; a place affording peace and quiet.
retreat (Noun) — (military) a signal to begin a withdrawal from a dangerous position.
retreat (Noun) — (military) a bugle call signaling the lowering of the flag at sunset.
retreat (Noun) — An area where you can be alone.
retreat (Noun) — Withdrawal for prayer and study and meditation. ex. "the religious retreat is a form of vacation activity"
retreat (Noun) — The act of withdrawing or going backward (especially to escape something hazardous or unpleasant).
retreat (Verb) — Pull back or move away or backward. ex. "The enemy retreated"
retreat (Verb) — Move away, as for privacy. ex. "The Pope retreats to Castelgondolfo every summer"
retreat (Verb) — Move back. ex. "The glacier retreats"
retreat (Verb) — Make a retreat from an earlier commitment or activity.