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: hurt meaningdefinition of muchmillion meaningongoing meaningprint meaningdefinition of mostdefinition of bodyharm definitionagree definitionuseful meaningvast meaningclean definition 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