What term describes a tenant's wrongful possession of another's land without a valid lease?

The term that describes a tenant's wrongful possession of another's land without a valid lease is "tenancy at sufferance." This situation occurs when a tenant continues to occupy the property after their lease has expired and without the landlord's consent. In this case, the tenant does not have a legal right to remain in the property, yet they are still physically present. This form of possession is not recognized as a valid tenancy because there is no lease agreement in place allowing the tenant to occupy the premises.

While the other terms relate to tenancy issues, they do not specifically describe the wrongful possession scenario. "Illegal tenancy" could suggest a broader range of unlawful situations regarding lease agreements, but it lacks the specific context of a tenant retaining possession after expiration without permission. "Forcible detainer" refers to a legal action taken by a landlord to regain possession of the property through court proceedings, and "constructive eviction" pertains to a situation where a landlord fails to provide a habitable living environment, thereby forcing a tenant to leave. Thus, "tenancy at sufferance" is the most accurate descriptor for wrongful occupancy without a valid lease.