adjective

• Having a visible or identifying mark.
• (of a playing card) Having a secret mark on the back for cheating.
• Clearly evident; noticeable; conspicuous.
• (linguistics, of a word, form, or phoneme) Distinguished by a positive feature.
• Singled out; suspicious; treated with hostility; the object of vengeance.
• In police livery, as opposed to unmarked. (of a police vehicle)