Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun The time required for one complete revolution of the earth about the sun, relative to the fixed stars, or 365 days, 6 hours, 9 minutes, 9.54 seconds in units of mean solar time.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun The
orbital period of theEarth ; a measure of thetime it takes for theSun to return to the sameposition with respect to thestars of thecelestial sphere . A sidereal year is about 20.4 minutes longer than thetropical year due toprecession of the equinoxes.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun the time for the earth to make one complete revolution around the sun, relative to the fixed stars
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