Definitions

1. verb

to free or release something, especially a room or area from a lease or other restriction

“The new owner decided to unlet the apartment and renovate it.”

2. verb

to let something go, especially a room or area, for use by someone else

“The landlord chose to unlet the office space to a start-up company.”

3. noun

a room or area that has been released from a lease or other restriction

“After the lease expired, the unlet space was available for rent.”