1. the act of falling inward or collapsing toward a center
Usage: physics; astronomy
2. matter that is drawn into a celestial body by gravitational force
Usage: astronomy

Examples

• The star’s gravitational infall compressed the surrounding gas.
• Scientists studied the infall of material into the black hole.
• The infall rate determines how quickly the star will grow.
• Computer models predicted the infall of dust particles.
• The infall velocity increased as matter approached the center.
• Astronomers measured the infall of hydrogen gas into the galaxy.