From Longman Dictionary of Contemporary Englishhang on to something (also hang onto something) phrasal verbKEEP/CONTINUE TO HAVEto keep something I think I’ll hang on to the documents for a bit longer. → hang→ See Verb table
Examples from the Corpus
hang on to • How long can you hang on to an impossible dream?• Always hang on to something that tells them who they are - and tells me, too, in this case.• If she wanted to hang on to the shreds of her professional reputation she'd better start by controlling her haywire emotions.• And, if like me you believe that dreams come true, you should hang on to them.• So I can hang on to things as I move around. 