Rude definition

(1) Socially incorrect in behavior

"Resentment flared at such an unmannered intrusion"

(2) Lacking civility or good manners

"Want nothing from you but to get away from your uncivil tongue"- Willa Cather

(3) Belonging to an early stage of technical development; characterized by simplicity and (often) crudeness

"The crude weapons and rude agricultural implements of early man"

"Primitive movies of the 1890s"

"Primitive living conditions in the Appalachian mountains"

(4) (of persons) lacking in refinement or grace