Each of the seven major celestial objects visible from the earth which move independently of the fixed stars and were believed to revolve around the…

First used in certain special applications. a planet.

= planet.

The seven ‘planets’ known to ancient and medieval observers (sun, moon, Mercury, Venus, Mars, Jupiter, and Saturn: see planet, n. 1a). Now historical.

That strays, in the senses of the verb. Of a thing. †straying star n. a planet; cf. errant, adj. 9b.

as tr. Latin planēta or Greek πλανήτης: A wandering star, planet.

Obsolete.

An erratic star, a planet. Obsolete. rare.