What is Entails?

Entails definition and meaning on Dictionary terms:
verb (used with object)

to cause or involve by necessity or as a consequence: a loss entailing no regret.
to impose as a burden: Success entails hard work.
Law. to limit the passage of (a landed estate) to a specified line of heirs, so that it cannot be alienated, devised, or bequeathed.
Law. to cause (anything) to descend to a fixed series of possessors.