1. Plural of halcyon; mythical birds said to calm the sea during their nesting period, or any of various kingfisher birds.
Usage: Often used in the phrase 'halcyon days' to mean a period of peace and prosperity.
2. Periods of peace, calm, or happiness (used attributively or in fixed phrases).
Usage: Chiefly literary or formal; often appears in 'halcyon days.'

Examples

• The halcyons of Greek mythology were believed to have magical powers over the ocean.
• She reminisced about the halcyon days of her childhood.
• The company enjoyed halcyon years before the market downturn.
• Ancient sailors feared losing the halcyons' protection during storms.
• Those halcyon moments seemed to last forever.