From Longman Dictionary of Contemporary Englishgeneral deliveryˌgeneral deˈlivery noun [uncountable] American EnglishTCM a post office department that keeps someone’s letters until that person comes to get them SYN poste restante British English
Examples from the Corpus
general delivery• As with the general delivery of curriculum, there is unlikely to be one single effective model.From Longman Business Dictionarygeneral deliveryˌgeneral deˈlivery noun [uncountable] American English a post office department to which you can send letters for someone, and which will keep them until they are collectedSYNposte restante BrE 