Pertaining to the planets; as planetary inhabitants; planetary motions.

Consisting of planets; as a planetary system.

Under the dominion or influence of a planet; as a planetary hour.

Produced by planets; as planetary plague or influence.

Having the nature of a planet; erratic or revolving. Planetary days, the days of the week as shared among the planets, each having its day, as we name the days of the week after the planets.