groundcover ground·co·ver uncommon noun 1. low-growing plants planted in deep shade or on a steep slope where turf is difficult to grow Synonymsground cover 2. small plants other than saplings growing on a forest floor Synonymsground cover Related words Broader terms underbrushvegetation Narrower terms rupturewortwhitlowwortpearlwortbaby's tears WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.