Meaning of hypomixolydian mode

hy'po•mix•o•lyd'ian mode'

Pronunciation: (hī'pō-mik"su-lid'ē-un, hip'ō-, hī"pō-, hip"ō-), [key]
— Music. Music.
  1. a plagal church mode represented on the white keys of a keyboard instrument by an ascending scale from D to D, with the final on G.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.