- Relating to the stars; starry; astral; as, sidereal
astronomy. - Measuring by the apparent motion of the stars;
designated, marked out, or accompanied, by a return to the same
position in respect to the stars; as, the sidereal revolution of a
planet; a sidereal day.
Meaning of 'sidereal' (Princeton's WordNet)
1 . sidereal
[ a]
Meaning (1): - of or relating to the stars or constellations
Example in sentence:
sidereal bodies;
the sidereal system
Meaning (2): - (of divisions of time) determined by daily motion of the stars