year

Definitions

• A solar year, the time it takes the Earth to complete one revolution of the Sun (between 365.24 and 365.26 days depending on the point of reference).
• (by extension) The time it takes for any astronomical object (such as a planet, dwarf planet, small Solar System body, or comet) in direct orbit around a star (such as the Sun) to make one revolution around the star.
• A period between set dates that mark a year, from January 1 to December 31 by the Gregorian calendar, from Tishiri 1 to Elul 29 by the Jewish calendar, and from Muharram 1 to Dhu al-Hijjah 29 or 30 by the Islamic calendar.
• A scheduled part of a calendar year spent in a specific activity.
• (sciences) A Julian year, exactly 365.25 days, represented by "a".
• A level or grade in school or college.
• The proportion of a creature's lifespan equivalent to one year of an average human lifespan (see also dog year).