1. relating to astronomy or celestial objects
2. extremely large in amount or extent
Usage: informal

Examples

• The astronomical observatory houses several powerful telescopes.
• She studied astronomical phenomena like black holes and supernovas.
• The cost of the new stadium was astronomical.
• Housing prices in the city have reached astronomical levels.
• The company reported astronomical profits this quarter.
• Astronomical calculations helped predict the eclipse.
• The debt had grown to astronomical proportions.