What is definition gainful?

Gainful is an adjective that relates to the acquisition of financial gain or profit. It is used to describe something that is profitable or advantageous in terms of money or financial benefit. The term can be used to refer to a gainful occupation or activity that earns a person a livelihood or income. It can also be used to describe a gainful investment that yields a return on investment. In summary, gainful refers to something that results in financial gain or profit.