Source : Webster's Revised Unabridged Dictionary (1913)

Rental \Rent"al\ (-al), n. [LL. rentale, fr. renta. See {Rent}
   income.]
   1. A schedule, account, or list of rents, with the names of
      the tenants, etc.; a rent roll.

   2. A sum total of rents; as, an estate that yields a rental
      of ten thousand dollars a year.

Source : WordNet®

rental
     adj 1: available to rent or lease; "a rental car"
     2: of or relating to rent; "rental agreement"; "rental charges"

rental
     n 1: property that is leased or rented out or let [syn: {lease},
          {letting}]
     2: the act of paying for the use of something (as an apartment
        or house or car) [syn: {renting}]