n. In classical legends, a bird said to nest on the sea, thereby calming the waters; later usually identified with a type of kingfisher, hence (poetic) a kingfisher.n. A tropical kingfisher of the genus Halcyon, such as the sacred kingfisher Halcyon sancta of Australia.adj. Pertaining to the halcyon or kingfisheradj. Calm, undisturbed, peaceful, serene.