Entry 1 sense Webster, 1913 Regain /(r?*g?n")/ · Re·gain · IPA /ɹiːˈɡeɪn/ 01 v. t. To gain anew; to get again; to recover, as what has escaped or been lost; to reach again. 1. To gain anew; to get again; to recover, as what has escaped or been lost; to reach again. Syn. To recover; reobtain; repossess; retrieve.