garden huckleberry gar·den·huck·leberry uncommon noun 1. improved garden variety of black nightshade having small edible orange or black berries Synonymsgarden huckleberrywonderberrysunberrySolanum nigrum guineeseSolanum melanocerasumSolanum burbankii Related words Broader terms black nightshade WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.