Definitions of halcyon:

  • noun:   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
  • noun:   a large kingfisher widely distributed in warmer parts of the Old World
  • noun:   (Greek mythology) a woman who was turned into a kingfisher
  • adjective:   idyllically calm and peaceful; suggesting happy tranquillity
    Example: "A halcyon atmosphere"
  • adjective:   marked by peace and prosperity
    Example: "The halcyon days of the clipper trade"