(verb)
to logically involve or suggest something as an accompaniment or result;
e.g. The dark rain clouds would entail a heavy storm later.
(verb)
to limit the generations which may inherit a property in order to restrict the ownership of the property, typically to keep it in the family;
e.g. He plans to entail his property to his children so that his brother does not inherit it.
(verb)
in old usage, to cause someone to possess or experience something permanently or indefinitely, or to fix someone inescapably in a particular status or condition;
e.g. Their plan will entail her to a life of poverty.
(noun)
a restriction or limitation on the inheritance of property that dictates which members of the owner's descendants may inherit, or an estate controlled by such a restriction;
e.g. He possesses an entail in the English countryside.