noun
- Classical Mythology. any of a group of nymphs who were the companions of Artemis.
noun
- Greek myth a mountain nymph
n.1580s, from Latin Oreas (genitive Oreadis), from Greek Oreias “mountain nymph,” from oros “mountain,” probably from PIE root *er-/*or- “to raise” (cf. Sanskrit rsvah “high,” Latin oriri “to raise;” see orchestra).