INTERVEN'TION, noun [Latin interventio.] 1. A state of coming or being between; interposition. Light is not interrupted by the intervention of a transparent body. 2. Agency of persons between persons; interposition; mediation; any interference that may affect the interests of others. Let us decide our quarrels at home without the intervention of a foreign power. 3. Agency of means or instruments; as, effects are produced by the intervention of natural causes. 4. Interposition in favor of another; a voluntary undertaking of one party for another. A bill of exchange may be accepted by the intervention of a third person in behalf of the drawer or of one of the indorsers.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI