Definitions of royalty
a payment made by a producer of oil, natural gas, or other fossil fuels to the owner of the land on which this fossil fuels are found
Coal royalties are expected to reach $414 million.
a payment to someone such as a writer or musician each time that something they have created is sold or used; a payment made to the owner of a patent for the use of that patent under licence
The singer's ex-wife is suing the record label over the loss of royalties.