Of or pertaining to an axiom; having the nature of an axiom; self-evident; characterized by axioms
evident without proof or argument; "an axiomatic truth"; "we hold these truths to be self-evident" of or relating to or derived from axioms; "axiomatic physics"; "the postulational method was applied to geometry"- S
If something is axiomatic, it seems to be obviously true. = self-evident. something that is axiomatic does not need to be proved because you can easily see that it is true = self-evident