- breach; violation; infringement: an infraction of the rules.
- Medicine/Medical. an incomplete fracture of a bone.
mid-15c., “the breaking of an agreement,” from Middle French infraction and directly from Latin infractionem (nominative infractio) “a breaking, weakening,” noun of action from past participle stem of infringere (see infringe).
- A bone fracture, especially one without displacement.