1. In astrology, one of three equal divisions of a zodiac sign, each spanning 10 degrees.
Usage: astrology; also spelled 'decane'
2. In ancient Egypt, a group of stars or a period of ten days used in the calendar.
Usage: historical; ancient Egyptian astronomy

Examples

• Each zodiac sign is divided into three decans, with each decan having distinct characteristics.
• In astrology, your decan can refine your sun sign interpretation.
• The ancient Egyptians used decans to mark the passage of time throughout the year.
• A person born in the first decan of Aries may have different traits than one born in the third decan.