A more thorough explanation:

Definition: Quare ejecit infra terminum is a legal term that refers to a writ for a lessee who was prematurely ejected, when the ejector was not actually in possession but one claiming under the ejector was. It is a Latin term that means "why he ejected within the term".

Example: If a landlord leases a property to a tenant for a certain period of time, but then tries to evict the tenant before the lease is up, the tenant can use the writ of quare ejecit infra terminum to seek restitution of the term of years and damages for the wrongful eviction.

This writ is used when the person who ejected the tenant was not actually in possession of the property, but someone claiming under them was. The writ is not used against the wrongdoer or ejector themselves, but against their feoffee or other person claiming under them.