white turnip whi·te·tur·nip uncommon noun 1. widely cultivated plant having a large fleshy edible white or yellow root Synonymsturnipwhite turnipBrassica rapa 2. white root of a turnip plant Synonymswhite turnip Related words Broader terms turnipturnip plant Parts turnipBrassica Part of white turnipturnip greens WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.