IPA: /əˈtɔrn/
KK: /əˈtɔrn/
To agree to continue being a tenant of a property after the ownership of that property has changed hands.
After the sale of the building, the tenants decided to attorn to the new owner.
Past: attorned
Past Participle: attorned
Attorn is derived from the Old French 'atourner' (meaning to turn to or to transfer). The prefix 'a-' (meaning to) and 'tourner' (meaning to turn) combine to convey the idea of turning or transferring allegiance or responsibility to another party.
Think of 'turning to' someone else when you 'attorn' — it means to transfer your allegiance or responsibility.