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 kingfisher, especially one of the genus Halcyon.
- A fabled bird, identified with the kingfisher, that was supposed to have had the power to calm the wind and the waves while it nested on the sea during the winter solstice.
- Calm and peaceful; tranquil.
- Prosperous; golden: halcyon years.