1. a person or thing that cancels something
2. a device that eliminates or reduces unwanted signals, noise, or interference
Usage: technical

Examples

• The noise canceller in my headphones blocks out airplane engine sounds.
• She was known as the meeting canceller because she frequently postponed appointments.
• The echo canceller improved the quality of the video conference call.
• The automatic canceller removed duplicate entries from the database.
• His reputation as a plan canceller made people hesitant to make arrangements with him.
• The interference canceller helped clear up the radio signal.