The meaning of LACKLUSTER is lacking in sheen, brilliance, or vitality : dull, mediocre. How to use lackluster in a sentence. Did you know?

Add to word list lacking energy and effort: a lackluster performance (Definition of lackluster from the Cambridge Academic Content Dictionary © Cambridge University Press)

LACKLUSTER definition: lacking lack brilliance or radiance; dull. See examples of lackluster used in a sentence.

Define lackluster. lackluster synonyms, lackluster pronunciation, lackluster translation, English dictionary definition of lackluster. adj. Lacking brightness, luster, or vitality; dull.

Oct 11, 2025 · lackluster (countable and uncountable, plural lacklusters) (American spelling) (uncountable) Lack of brightness or points of interest. (countable) A person or thing of no …

Definition of lackluster adjective in Oxford Advanced American Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

WordReference Random House Unabridged Dictionary of American English © 2024 lack•lus•ter (lak′ lus′tər), adj. lacking brilliance or radiance; dull: lackluster eyes. lacking liveliness, vitality, …

Lackluster is a compound adjective that means what it sounds like: if something is lackluster it lacks luster; in other words, it is without brilliance, shine, or vitality.

If you describe something or someone as lackluster, you mean that they are not exciting or energetic. He has already been blamed for his party's lackluster performance during the …

Not exceptional; not worthy of special merit, attention, or interest; having no vitality. The actor gave a lackluster performance in his latest film.