year year /ˈjɪr/

noun

1. () A period of time containing 365 (or 366) days  ( twelvemonth , yr , year )
   a period of time containing 365 (or 366) days
    She is 4 years old
   she is 4 years old
    In the year 1920
   in the year 1920
   
2. () A period of time occupying a regular part of a calendar year that is used for some particular activity  ( year )
   a period of time occupying a regular part of a calendar year that is used for some particular activity
    A school year
   a school year
   
3. () The period of time that it takes for a planet (as, e.g., Earth or Mars) to make a complete revolution around the sun  ( year )
   the period of time that it takes for a planet (as, e.g., Earth or Mars) to make a complete revolution around the sun
    A Martian year takes 687 of our days
   a Martian year takes 687 of our days
   
4. () A body of students who graduate together  ( class , year )
   a body of students who graduate together
    The class of '97
   the class of '97
    She was in my year at Hoehandle High
   she was in my year at Hoehandle High