What is the meaning of intervention?

noun

• The act of intervening (as to mediate a dispute, etc.. )
  • usage: "it occurs without human intervention"
  • synonyms: intercession
• A policy of intervening in the affairs of other countries.
  • synonyms: interference
• The act or fact of interposing one thing between or among others.
  • synonyms: interposition
• Law) a proceeding that permits a person to enter into a lawsuit already in progress; admission of person not an original party to the suit so that person can protect some right or interest that is allegedly affected by the proceedings. (
  • usage: "the purpose of intervention is to prevent unnecessary duplication of lawsuits"
• Care provided to improve a situation (especially medical procedures or applications that are intended to relieve illness or injury. ).
  • synonyms: treatment