WAIN Meaning of WAIN in English /wayn/ , n.1. ( cap. ) Astron. Charles's Wain. See Big Dipper . 2. a farm wagon or cart. [ bef. 900; ME; OE waegn, waen, c. D wagen, G Wagen. See WEIGH 1 ] Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012