Definition of prognostic

• a. - Indicating something future by signs or symptoms; foreshowing; aiding in prognosis; as, the prognostic symptoms of a disease; prognostic signs.
• a. - That which prognosticates; a sign by which a future event may be known or foretold; an indication; a sign or omen; hence, a foretelling; a prediction.
• a. - A sign or symptom indicating the course and termination of a disease.
• v. t. - To prognosticate.