1
: involvement in the activities and concerns of other people when your involvement is not wanted : the act of interfering
We had to put up with loud noise and constant interference from the neighbors.
interference in the affairs of another nation
trying to avoid governmental interference
2
: additional signals that weaken or block the main signal in a radio or television broadcast
It was hard to hear the radio program because of all the interference.
electrical interference
The TV picture had a lot of interference.
3
sports
: the act of illegally hitting or getting in the way of an opponent
a hockey player receiving a penalty for interference
Cite this Entry
“Interference.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/interference. Accessed 20 Jun. 2026.
Copy Citation
