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