winterful adjective 1noun 1forms 4 adjective1 •Characteristic of or occurring during winter.Here spreads a cosy net of little fields Secured with hedges, wild and winterful, Watching the year revolve. — 1978 noun1 •A quantity that lasts or is produced during a winter.“Maybe it's just a little snow and not a whole winterful,” suggested Alice, as she climbed out of bed to look. — 1926 formswinterfuls · wintersful · more winterful · most winterful