a division of time equal to the equinoctial year plus 20 minutes, representing the time required for the earth to complete one revolution around the sun, measured with relation to the fixed stars.
- Compare anomalistic year.
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How to use sidereal year in a sentence
In reducing these days to years the sidereal year was taken as the Standard year.The Book of Daniel Unlocked | W. S. Auchincloss
British Dictionary definitions for sidereal year
See year (def. 5)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012