Relinquish means to stop having something, especially when this happens unwillingly. See how to use this formal verb in sentences, synonyms, pronunciation and word origin. Relinquish definition : to renounce or surrender (a possession, right, etc.).. See examples of RELINQUISH used in a sentence. The meaning of RELINQUISH is to withdraw or retreat from : leave behind. How to use relinquish in a sentence. Synonym Discussion of Relinquish . RELINQUISH meaning : 1. to give up something such as a responsibility or claim: 2. to unwillingly stop holding or…. Learn more.