¹ bounce verb

• to cause (a ball, rock, etc.) to hit against a surface and quickly move in a different and usually opposite direction
• to move in one direction, hit a surface (such as a wall or the floor), and then quickly move in a different and usually opposite direction—usually + off
• to move with a lot of energy and excitement

² bounce noun

• the act or action of bouncing off the ground or another surface
• the ability to move quickly in a different direction after hitting a surface : the ability to bounce
• a quality that makes a person's hair look healthy, full, and attractive : a bouncy quality