rude (Adjective) — Socially incorrect in behaviour. ex. "resentment flared at such a rude intrusion"
rude (Adjective) — (of persons) lacking in refinement or grace. ex. "I did not know I contradicted anybody in calling your mother rude"
rude (Adjective) — Lacking civility or good manners. ex. "want nothing from you but to get away from your rude tongue"
rude (Adjective) — (used especially of commodities) being unprocessed or manufactured using only simple or minimal processes. ex. "bales of rude cotton"
rude (Adjective) — Belonging to an early stage of technical development; characterized by simplicity and (often) crudeness. ex. "the crude weapons and rude agricultural implements of early man"
rude (Adjective) — Good and vigorous.