[sev.en.ty] n, pl -ties [seventy, adj., fr. ME, fr. OE seofontig, short for hundseofontig, fr. hundseofontig, n., group of seventy, fr. hund hundred + seofon seven + -tig group of ten; akin to OE tien ten] (13c) 1: seven times ten
2. pl: the numbers 70 to 79; specif: the years 70 to 79 in a lifetime or century 3 cap: a Mormon elder ordained for missionary work under the apostles -- sev.en.ti.eth adj or n -- seventy adj -- seventy pron, pl in constr