English Adverb eather (not comparable) Obsolete spelling of either. 1838, William Makepeace Thackeray, Memoirs of Mr. Charles J. Yellowplush:We are marters, both of us, to prinsple; and every body who knows eather knows that we would sacrafice anythink rather than that. Anagrams Aether, Heater, aether, hearte, heater, hereat, reheat, ætherWikiwand - on Seamless Wikipedia browsing. On steroids.