D defs.my
Entry 2 senses Webster, 1913

Nimbus

/nĭm'-bəs/ · Nim·bus · IPA /ˈnɪm.bəs/
01 n. A circle, or disk, or any indication of radiant light around the heads of divinities, saints, and sovereigns, upon medals, pictures, etc.; …
pl. Nimbi, Nimbuses ((#))
  1. 1.
    A circle, or disk, or any indication of radiant light around the heads of divinities, saints, and sovereigns, upon medals, pictures, etc.; a halo. See Aureola, and Glory, n., 5.(Fine Arts) See: Aureola, Glory
  2. 2.
    A rain cloud; one of the four principal varieties of clouds. See Cloud.(Meteor.) See: Cloud