1. The king-fisher, a bird whose hatching season was fabled to be always accompanied with calm weather.

2. The kingfisher.

3. Calm; peaceful; happy. Halcyon days, days of quiet prosperity, literally, the seven days preceding and the seven succeeding the winter solstice, while the king-fisher was breeding.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• halycon,
• alsyon,
• falchyon,
• halcion,
• galcyon,
• balcyon,
• nalcyon,
• jalcyon,
• ualcyon,
• yalcyon,
• hzlcyon,
• hslcyon,
• hwlcyon,
• hqlcyon,
• hakcyon,
• hapcyon,
• haocyon,
• halxyon,
• halvyon,
• halfyon

• halcomb,
• halcion,
• halligan.

The adjective form of the word "halcyon" is "halcyon".

The plural of the "halcyon" can be the "halcyons".

The singular of the "halcyon" can be the "halcyon".