society > law > legal right > right of possession or ownership > tenure of property > a legal holding > [adjective] > held in leasehold or by tenant > not (5)
Not assigned or allocated (to one); unlet.
Not let or rented out; = unlet, adj.
Of land, property, etc.: not held or let on lease.
That cannot be let or rented out; impossible to let; unsuitable for letting.