[Adjective] Very profitable, making lots of money. Example: He had a lucrative business selling chips from a van after the pubs closed.
Found on http://www.bbc.co.uk/skillswise/glossary/
Lu'cra·tive adjective [ Latin lucrativus , from lucrari to gain, from lucrum gain: confer French lucratif . See Lucre .] 1. Yielding lucre; gainful; profitable; making increase of money or goods; as, a lucrative business or office. « The trade... Found on http://www.encyclo.co.uk/webster/L/67