Definition of "halcyon" in English

noun

1. (poetic) A kingfisher whose nesting by the sea was said, in classical mythology, to cause the Gods to restrain the wind and waves.

2. A tropical kingfisher of the genus Halcyon, such as the sacred kingfisher (Halcyon sancta) of Australia.

adjective

1. Pertaining to the halcyon or kingfisher.

2. (figurative) Calm, undisturbed, peaceful, serene.