Intervene - Definition

v 1: get involved, so as to alter or hinder an action, or
through force or threat of force; "Why did the U.S. not
intervene earlier in WW II?" [syn: intervene, step in,
interfere, interpose]
2: be placed or located between other things or extend between
spaces and events; "This interludes intervenes between the
two movements"; "Eight days intervened"
3: occur between other event or between certain points of time;
"the war intervened between the birth of her two children"