re - Wiktionary, the free dictionary
https://en.m.wiktionary.org/wiki/re
WEBFeb 19, 2024 · re. About, regarding, with reference to; especially in letters, documents and emails. Synonyms: about, apropos, as for; see also Thesaurus: about; Usage notes [edit] This word, when used in this particular sense, is often rendered as Re: (with a colon and a capital R). It is not an abbreviation.
DA: 5 PA: 89 MOZ Rank: 72