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: participate meaningcode meaningsignature meaningalready meaningmission meaningdefinition of thosecolor meaningtrust meaningart meaningvector definitionvaluable meaningaddition 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