lackluster

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. Think dull.

Shakespeare gave us the compound lackluster, first using the term in his play As You Like It. In 2:7, the character Jacques says, "And then he drew a dial from his poke, And, looking on it with lack-lustre eye..." Since Shakespeare first coined this word, it has been used to describe anything "blah"; lackluster sales would worry shop owners and a lackluster prom dress might help you blend in with the wallpaper.

Definitions of lackluster
1

adj lacking brilliance or vitality

“a dull lackluster life”
Synonyms:
lacklustre, lusterless, lustreless
dull
lacking in liveliness or animation

adj lacking luster or shine

“staring with lackluster eyes”
Synonyms:
lacklustre, lusterless, lustreless
dull
emitting or reflecting very little light