ˈwhethered,ppl.a.dial. So whetheringvbl.n. (See quots.) 1614Markham Cheap Husb., Bull etc. xxxvi. 60 Of a Cow that is whethered. This disease is when a Cow after her caluing cannot cast her cleaning.1847–54Webster, Whethering, the retention of the after-birth in cows. Gardner.