'regroup' definitions:

Definition of 'regroup'

From: WordNet
verb
Organize anew, as after a setback [syn: reorganize, reorganise, regroup]
verb
Reorganize into new groups

Definition of 'regroup'

From: GCIDE
  • regroup \regroup\, re-group \re-group\v. i. & t. To reorganize into new groups; to reform a group that has been dispersed. The spelling without the hyphen is more common. [WordNet 1.5]