Definition of "lackluster" in English

adjective

1. Lacking brilliance or intelligence.

2. Having no shine or lustre; dull.

3. (figurative) Not exceptional; not worthy of special merit, attention, or interest; having no vitality.

   • The actor gave a lackluster performance in his latest film.

noun

1. (uncountable) Lack of brightness or points of interest.

2. (countable) A person or thing of no particular brilliance or intelligence.