\O"re*ad\, n. [L. Oreas, -adis, Gr. 'Oreia`s, -a`dos, fr.
'o`ros mountain: cf. F. or['e]ade.] (Class. Myth.)
One of the nymphs of mountains and grottoes.
      Like a wood nymph light, Oread or Dryad. --Milton.