01 a. Of or pertaining to the planets; as, planetary inhabitants; planetary motions; planetary year.
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1.
Of or pertaining to the planets; as, planetary inhabitants; planetary motions; planetary year.
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2.
Consisting of planets; as, a planetary system.
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3.
Under the dominion or influence of a planet.(Astrol.)
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4.
Caused by planets.
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5.
Having the nature of a planet; erratic; revolving; wandering.
Phrases & compounds
Planetary days —
the days of the week as shared among the planets known to the ancients, each having its day.
Planetary nebula —
a nebula exhibiting a uniform disk, like that of a planet.