Planetary \Plan"et*a*ry\, a. [Cf. L. planetarius an astrologer, F. plan['e]taire planetary. See Planet.]

1. Of or pertaining to the planets; as, planetary inhabitants; planetary motions; planetary year.

2. Consisting of planets; as, a planetary system.

3. (Astrol.) Under the dominion or influence of a planet. ``Skilled in the planetary hours.'' --Drayton.

4. Caused by planets. ``A planetary plague.'' --Shak.

5. Having the nature of a planet; erratic; revolving; wandering. ``Erratical and planetary life.'' --Fuller.

Planetary days, the days of the week as shared among the planets known to the ancients, each having its day. --Hutton.

Planetary nebula, a nebula exhibiting a uniform disk, like that of a planet.

Source: Webster's Revised Unabridged Dictionary (1913)