Continuing throughout the year.

a year with an extra day, a leap year

The time that it takes for the Sun to return to the same position along the ecliptic, as viewed from the Earth, especially: / A vernal equinox year, the time between two successive vernal equinoxes.

(informal) A period of time in the life of dogs, defined such that the average life expectancy of a dog in "dog years" is numerically equivalent to the average life expectancy of a human. A 4- and a 5-year-old dog are about as mature as a human of 28 to 30 years and 33 to 35 years, respectively. The most common calcuation uses a ratio of seven dog years to one human year.

(Britain, Ireland, Australia, idiomatic) A long time, years and years.

a year determined by a certain number of phases of the moon, as opposed to the passage of the Earth around the sun

The orbital period of the Earth; a measure of the time it takes for the Sun to return to the same position with respect to the stars of the celestial sphere. A sidereal year is about 20.4 minutes longer than the tropical year (which is what is kept stable by the Gregorian calendar) due to precession of the equinoxes.

plural of dog year

One person's working time for a year, or the equivalent, used as a measure of how much work or labor is required or consumed to perform some task.

(idiomatic, euphemistic) Old age; especially, the leisure years in later life after one has retired from employment. / (idiomatic) The period during which someone or something flourishes.