For the religious term, please seeprophet.
Profit was the gain from asale minus what was invested to make that sale, usually in terms ofcurrency. For example, if one purchased an item for 100 credits, and sold it for 200, then one has gained 100 credits in profit. Aprofit margin was a measurement of profitability.
Harry Mudd once visited theplanetOmega Cygni, where he made a large profit by sellingthe natives their ownoceans. (TAS: "Mudd's Passion")
ThearchaeologistVash always chose profit when it came to choose betweenscience and profit. (DS9: "Q-Less")
Profit is also widely known to be the central driving force behind what mostcapitalisticFerengi do, and a major aspect of theirreligion. (DS9: "Body Parts")