Is Astar a planet?

Could you please clarify if Astar is indeed a planet? I'm curious to know if it's an actual celestial body orbiting a star, or if the term is being used metaphorically or in reference to something else entirely. I'm aware that the universe is vast and filled with many wonders, but I'm particularly interested in understanding if Astar fits the scientific definition of a planet. Thank you for your consideration in addressing this question.