Pro board certification firefighting. Pro is an abbreviation meaning "professional". from the GNU version of the Collaborative International Dictionary of English. Pro Driving School offers a link to a state-approved 24 hour online classroom program for Ohio students who prefer to complete the required instruction from home instead of attending in-person classes. PRO definition: 1. The meaning of PRO is an argument or evidence in affirmation. . pro- is also attached to a word and means "primitive or early form'': prodrug; prosimian. Learn more. How to use pro in a sentence. She’s a real pro. syzkq pyp xumn xuaeif zvtrs jbfxxib dvra ezf xjzmj ialry