lackluster What is the Definition of lackluster?Adjective:lacking brilliance or vitalitylacking luster or shine Other meanings of lackluster (synonyms, cognates). ENRU lackluster тусклый Frequently viewed: vision definitionsoft meaningbelow definitiondevelop definitionwear meaningchar definitionevaluate definitionagree meaningpurpose meaningdefinition of turnsince meaningdefinition of bandwidth A B C D E F G H I J K L M N O P Q R S T U V W X Y Z