- halcyon - idyllically calm and peaceful; suggesting happy tranquillity; "a halcyon atmosphere"
Antonym: unpeaceful (indirect, via peaceful)
- golden, halcyon, prosperous - marked by peace and prosperity; "a golden era"; "the halcyon days of the clipper trade"
Antonym: unhappy (indirect, via happy)
- Alcyone, Halcyon - (Greek mythology) a woman who was turned into a kingfisher
--1 is a kind of mythical being
- Halcyon, genus Halcyon - a large kingfisher widely distributed in warmer parts of the Old World
--2 is a kind of bird genus
--2 is a member of Alcedinidae, family Alcedinidae - halcyon - a mythical bird said to breed at the time of the winter solstice in a nest floating on the sea and to have the power of calming the winds and waves
--3 is a kind of mythical being