What does ancillary revenue mean?

ancillary revenue meaning in Law Dictionary

Profits gotten from nonprimary products offered.

ancillary revenue meaning in Business Dictionary

Revenue that is based on items or solutions except that an organization's major product providing. Examples include concessions at sporting events, pay-per-view films provided by air companies, and carwash solutions offered by filling stations. Ancillary revenue may in some instances exceed main incomes, resulting in changes in company designs.