Definitions

1. adjective

relating to or characteristic of the Nereids, sea nymphs in Greek mythology, or to the ocean or sea

“The nereidean melody evoked a soothing sense of the ocean’s vastness.”

2. noun

a sea nymph or a member of a group of sea nymphs in Greek mythology

“In Homer’s Odyssey, the nereidean Calypso kept Odysseus captive for seven years.”