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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

time unit, unit of time
a unit for measuring time periods

noun.time

19 Subcategories

day, twenty-four hours, twenty-four hour period, 24-hour interval, solar day, mean solar day go
time for Earth to make a complete rotation on its axis
night go
the dark part of the diurnal cycle considered a time unit
mean time, mean solar time go
(astronomy) time based on the motion of the mean sun (an imaginary sun moving uniformly along the celestial equator)
TT, terrestrial time, terrestrial dynamical time, TDT, ephemeris time go
(astronomy) a measure of time defined by Earth's orbital motion
month go
a time unit of approximately 30 days
day, sidereal day go
the time for one complete rotation of the earth relative to a particular star, about 4 minutes shorter than a mean solar day
bell, ship's bell go
(nautical) each of the eight half-hour units of nautical time signaled by strokes of a ship's bell
hour, hr, 60 minutes go
a period of time equal to 1/24th of a day
half-hour, 30 minutes go
a half of an hour
quarter-hour, 15 minutes go
a quarter of an hour
minute, min go
a unit of time equal to 60 seconds or 1/60th of an hour
quarter go
a unit of time equal to 15 minutes or a quarter of an hour
second, s, sec go
1/60 of a minute
attosecond go
one quintillionth (10^-18) of a second
femtosecond go
one quadrillionth (10^-15) of a second
picosecond go
one trillionth (10^-12) of a second
nanosecond go
one billionth (10^-9) of a second
microsecond go
one millionth (10^-6) of a second
millisecond, msec go
one thousandth (10^-3) of a second