Entry 3 senses · 2 variants Webster, 1913 Eighty /āʹti/ · Eight·y · IPA /[ˈ(ʔ)eɪ̯ɾi]/ a. n. 01 a. Eight times ten; fourscore. 1. Eight times ten; fourscore. 02 n. The sum of eight times ten; eighty units or objects. 1. The sum of eight times ten; eighty units or objects. 2. A symbol representing eighty units, or ten eight times repeated, as 80 or lxxx.