1. To follow as a consequence or a result of some action: "When people heard about the attack, several demonstrations ensued and they were ensuing for many days."
2. To follow immediately or to come afterward: "The employer and employees could not come to an agreement and so a strike by the unions ensued."
3. Etymology: from Old French ensivre, "to follow close upon"; from Late Latin insequere; from Latin insequi, "to pursue"; from in-, "upon" + sequi, "follow".