to arrange the way people or soldiers work together in a new way, especially in order to continue fighting or attacking sb
They regrouped their forces and renewed the attack.
After its election defeat, the party needs to regroup.
of a person
to return to a normal state after an unpleasant experience or a period of difficulty, and become ready to make an effort again with new enthusiasm or strength
Summer is a time to relax, regroup and catch up on all those things you've been putting off all year.