Definition of subluminary in US English:

subluminary

adjective

  • 1Sublunary; earthly; mundane.

  • 2Physics. = subluminalrare.

Origin

Early 17th century. From sub- + either luminary or luminary.

Pronunciation

subluminary

/ˌsʌbˈl(j)uːmɪn(ə)ri/