Interference
Part of speech: noun
Definition: The act of interfering with something, or something that interferes. The illegal obstruction of an opponent in some ball games. An effect caused by the superposition of two systems of waves, such as a distortion on a broadcast signal due to atmospheric or other effects. In United States patent law, an inter partes proceeding to determine the priority issues of multiple patent applications; a priority contest.
Example sentence: The art of natural education consists in ignoring the faults of children nine times out of ten, in avoiding immediate interference, which is usually a mistake, and devoting one's whole vigilance to the control of the environment in which the child is growing up, to watching the education which is allowed to go on by itself.
Intervention
Part of speech: noun
Definition: The action of intervening; interfering in some course of events.A legal motion through which a person or entity who has not been named as a party to a case seeks to have the court order that they be made a party.
Example sentence: The NHS needs to change fundamentally. It's a fragmented service when it should be joined-up. It's a last-minute crisis intervention service when it should be about prevention. It's a sickness service when it should have promoting health as its core. Crucially, it doesn't do enough to help people to help themselves.