what does planet mean

A planet is a large celestial body that orbits a star, such as the Sun, and has enough mass for its gravity to shape it into a nearly round form. It also must have cleared the neighborhood around its orbit, meaning it is gravitationally dominant in its orbit. The word "planet" comes from the ancient Greek word "planēt," meaning "wanderer," reflecting how planets move across the sky relative to the stars. This modern scientific definition was adopted by the International Astronomical Union in 2006, which excludes bodies like Pluto from being considered a full planet because it hasn't cleared its orbit.