Definition of halcyon

• n. - A kingfisher. By modern ornithologists restricted to a genus including a limited number of species having omnivorous habits, as the sacred kingfisher (Halcyon sancta) of Australia.
• a. - Pertaining to, or resembling, the halcyon, which was anciently said to lay her eggs in nests on or near the sea during the calm weather about the winter solstice.
• a. - Hence: Calm; quiet; peaceful; undisturbed; happy.