Intervention Defined

Main Entry: in?ter?vene
Pronunciation: \?in-t?r-?v?n\
? in?ter?ven?tion \-?ven(t)-sh?n\ nou
Function: intransitive verb
Inflected Form(s): in?ter?vened; in?ter?ven?ing
Etymology: Latin intervenire to come between, from inter- + venire to come ? more at come
Date: 1587

1 : to occur, fall, or come between points of time or events <only six months intervened between their marriage and divorce>
2 : to enter or appear as an irrelevant or extraneous feature or circumstance <it’s business as usual until a crisis intervenes>
3 a : to come in or between by way of hindrance or modification <intervene to stop a fight> b : to interfere with the outcome or course especially of a condition or process (as to prevent harm or improve functioning)
4 : to occur or lie between two things
5 a : to become a third party to a legal proceeding begun by others for the protection of an alleged interest b : to interfere usually by force or threat of force in another nation’s internal affairs especially to compel or prevent an action

synonyms see interpose
When talking about labor interventions, what comes to your mind?