Ligustrum ibolium li·gust·ru·mibolium uncommon noun 1. fast-growing and tightly branched hybrid of Ligustrum ovalifolium and Ligustrum obtusifolium Synonymsibolium privetibota privetLigustrum ibolium Related words Broader terms privet WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.