m]
| 1. | a self-evident truth that requires no proof. |
| 2. | a universally accepted principle or rule. |
| 3. | Logic, Mathematics. a proposition that is assumed without proof for the sake of studying the consequences that follow from it. |

In mathematics, a statement that is unproved but accepted as a basis for other statements, usually because it seems so obvious.
Note: The term axiomatic is used generally to refer to a statement so obvious that it needs no proof.