Whittier, John GreenleafPronunciation: /ˈwɪtɪə/Definition of Whittier, John Greenleaf (1807–92), American poet and abolitionist. He is best known for his poems on rural themes, especially ‘Snow-Bound’ (1866). Whittier, John Greenleaf in other Oxford dictionaries Definition of Whittier, John Greenleaf in the US English dictionary