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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

abstraction, abstract entity go
a general concept formed by extracting common features from specific examples

measure, quantity, amount go
how much there is or how many there are of something that you can quantify

fundamental quantity, fundamental measure go
one of the four quantities that are the basis of systems of measurement

period, time period, period of time go
an amount of time

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

noun.time

4 Subcategories

anomalistic year go
time of the earth's revolution from perihelion to perihelion again
solar year, tropical year, astronomical year, equinoctial year go
the time for the earth to make one revolution around the sun, measured between two vernal equinoxes
lunar year go
a period of 12 lunar months
sidereal year go
the time for the earth to make one complete revolution around the sun, relative to the fixed stars