Noun

• S: (n) Alcyone, Halcyon ((Greek mythology) a woman who was turned into a kingfisher)
• S: (n) Halcyon, genus Halcyon (a large kingfisher widely distributed in warmer parts of the Old World)
• S: (n) 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)

Adjective

• S: (adj) halcyon (idyllically calm and peaceful; suggesting happy tranquillity) "a halcyon atmosphere"
• similar to
• antonym
• W: (adj) unpeaceful [Indirect via peaceful] (not peaceful) "unpeaceful times"; "an unpeaceful marriage"
• antonym
• Overview
• synset
• S: (adj) golden, halcyon, prosperous (marked by peace and prosperity) "a golden era"; "the halcyon days of the clipper trade"
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• antonym
• W: (adj) unhappy [Indirect via happy] (experiencing or marked by or causing sadness or sorrow or discontent) "unhappy over her departure"; "unhappy with her raise"; "after the argument they lapsed into an unhappy silence"; "had an unhappy time at school"; "the unhappy (or sad) news"; "he looks so sad"