Small particles of matter and dust-like material found in space.

= meteor dust n. (b) at meteor, n.1 adj.1compounds 2. Now rare.

(a) fine meteoroid particles in interplanetary space; (b) fine particles of meteoric origin in the earth's atmosphere or on the earth's surface.

Belonging to the material universe as distinguished from the earth; extra-terrestrial. cosmic dust, minute particles of matter in space or of…