(physics, astronomy) Of a star, specifically its equator: darker due to gravity darkening.

(physics, astronomy) The phenomenon of a star rotating so rapidly that it is oblate, with a larger radius and thus lower surface gravity at the equator (which is thus cooler and darker: gravity-darkened), and higher surface gravity at the poles (which are hotter and brighter: gravity brightened).

Alternative form of limb darkening

(physics, astronomy) Darkened by limb darkening.

Alternative form of limb-darkened

(physics, astronomy) The optical effect where the edge of the disk of a star appears darker than the center of the disk.

Alternative form of darken someone's door

Alternative form of darken someone's door

(idiomatic) To arrive at someone's residence or location, especially as an unexpected visitor.

(idiomatic) To go to church to attend a service.