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 period of time containing 365 (or 366) days; "she is 4 years old"; "in the year 1920"
a period of time occupying a regular part of a calendar year that is used for some particular activity; "a school year"
used of a group whose members acted or were acted upon collectively and when `all' and `together' can be separated by other words; "they were herded all together"; "they were all herded together"; "the books lay all together in a heap"; "the books all lay together..."
all at the same time; "Let's say `Yes!' all at once"