Interference (noun)

1. The act of obstructing or hindering something.
2. The act of interrupting or disturbing a signal, such as radio waves or sound waves, by introducing another signal.
3. The prevention or distortion of a radio signal by atmospheric or other factors.

Origin:

Late middle english: from old french entreference, from entre- "between" + fere "companion".

Examples:

1. The construction work was causing interference with his ability to sleep.
2. The interference of the signal was caused by electrical interference from nearby power lines.
3. The interference between the two radio signals was causing problems with reception.
4. The athlete was penalized for interference during the game.
5. The interference of the light waves with each other produced a beautiful pattern.