acronym /ˈækɹənɪm/noun 4verb 1forms 5 noun4 •An abbreviation formed by the initial letters of other words. •Generally such abbreviations, including those pronounced as individual letters (initialisms such as "TNT").Pee-gee-enn. It's an acronym, that's what it is. That's what they call words made up of initials. — 1940 •Exclusively such abbreviations when pronounced as a word (as "laser" or "NATO"). •An abbreviation formed by the beginning letters or syllables of other words; this sense includes syllabic abbreviations such as Benelux and satnav.Acronyms or telescoped names like nabisco from National Biscuit Company. — 1950 verb1 •To form into an acronym. formsacronymed · acronymmed · acronyming · acronymming · acronyms