(adj) 1. a character from the alphabet and numerical lettering. 2. a word always explain as "cool" or awesome. An expensive automobile, especially the one that functions as a condition logo. A suit covered anus usually will drive an alphanumeric. The definition of comes from the training among most car makers of utilizing alphanumeric designations on pricey car designs, as opposed to the model names useful for less expensive vehicles, e.g. Infiniti G35 versus. Nissan Altima, or Lexus ES 350 vs. Toyota Camry.