Final answer:
A life estate pur autre vie is a life estate that lasts for the lifetime of someone other than the grantor. Option B and D do not correctly define a life estate pur autre vie, as it is contingent on a person's lifespan, not the grantor's life or a fixed term.
Step-by-step explanation:
A life estate pur autre vie is defined as a life estate where the duration is measured by the life of a person other than the grantor. In other words, the person who holds the life estate, known as the life tenant, has possession of the property for the duration of another person's life. Once that person passes away, the rights of the property are passed on according to the original agreement, which may be back to the original owner or to a remainderman.
The options given for the definition of a life estate pur autre vie are incorrect. Option B, 'For the life of the grantor,' refers to an ordinary life estate, not pur autre vie. Option D, 'For a specific term,' does not accurately describe a life estate pur autre vie either, as it is not for a predetermined period, but rather contingent upon someone's lifespan.
Understanding such terms is crucial in property law and estate planning, where it's essential to recognise the various interests that can be created in and the numerous ways to manage and transfer property rights.