two of three equal parts of a divisible whole
a racehorse that is two years old
a period of time containing 365 (or 366) days
a period of time occupying a regular part of a calendar year that is used for some particular activity
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 body of students who graduate together
being one more than one
