forty
Cross references: 1. number for.ty \'fo.rt-e-\ n [ME fourty, adj., fr. OE fe-owertig, fr. fe-owertig gro]up of 40, fr. fe-ower four + -tig group of 10 - more at EIGHTY 2: the third point scored by a side in a game of tennis pl 3: the numbers 40 to 49; specif : the years 40 to 49 in a lifetime or century - forty ajor ;pn