An ambassador is an official envoy, especially a high-ranking diplomat who represents a state and is usually accredited to another sovereign state or to an international organization as the resident representative of their own government or sovereign or appointed for a special and often temporary diplomatic assignment. The word is also used informally for people who are known, without national appointment, to represent certain professions, activities, and fields of endeavor, such as sales.

ರಾಯಭಾರಿ ಎಂದರೆ ಒಂದು ರಾಷ್ಟ್ರವನ್ನು ಇನ್ನೊಂದು ರಾಷ್ಟ್ರದಲ್ಲಿ ಅತ್ಯುನ್ನತ ಶ್ರೇಣಿಯಲ್ಲಿ ಪ್ರತಿನಿಧಿಸುವ ವ್ಯಕ್ತಿ. ಈಗ ಈ ಶಬ್ದವನ್ನು ಒಂದು ಸಂಸ್ಥೆಯನ್ನು ಪ್ರತಿನಿಧಿಸುವ ವ್ಯಕ್ತಿಗೂ ಉಪಯೋಗಿಸುತ್ತಾರೆ.