1. having a frequency above the range of human hearing (typically above 20,000 Hz)
Usage: technical; physics
2. using or produced by ultrasonic waves
Usage: medical; industrial

Examples

• The ultrasonic cleaner uses high-frequency sound waves to remove dirt.
• Bats navigate using ultrasonic echolocation calls.
• The doctor performed an ultrasonic examination of the patient.
• Ultrasonic welding joins plastic parts without adhesives.
• Dogs can hear ultrasonic frequencies that humans cannot detect.
• The ultrasonic sensor detected objects in the robot’s path.