A poetic or archaic term for the sun. The daystar rose majestically over the horizon, heralding the start of a new day.
The planet Venus when it appears in the morning sky. Before dawn, the daystar shone brightly, guiding travelers on their early morning journey.
An archaic or poetic name for the fallen angel Lucifer, identified with the morning star. "How art thou fallen from heaven, O daystar, son of the morning!"