I. ˈtwintə(r) noun
( -s )
Etymology: Middle English, from Old English twiwintre two years old, from twi- + winter
dialect Britain : a sheep, ox, or horse that has lived through two winters
II. adjective
Etymology: from (assumed) Middle English, from Old English twiwintre
dialect Britain : two years old — used especially of sheep and cattle
a twinter ewe