jamberry jam·berry uncommon noun 1. Mexican annual naturalized in eastern North America having yellow to purple edible fruit resembling small tomatoes Synonymstomatillomiltomatepurple ground cherryPhysalis philadelphica 2. annual of Mexico and southern United States having edible purplish viscid fruit resembling small tomatoes SynonymstomatilloMexican husk tomatoPhysalis ixocarpa Related words Broader terms ground cherry Part of tomatillo WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.