A military officer who serves as an adjutant to a higher ranking officer, prince or other high political dignitary
Unlike the orderly or batman, a humble low-ranking servant, an aide-de-camp is often a general, who before the institution of the chief of staff could hold a similar position to his chief.
military officer who performs secretarial duties for a superior officer; personal assistant
An aide-de-camp is an officer in the armed forces who helps an officer of higher rank. a colonel who had been aide-de-camp to the king. aides-de-camp a military officer whose job is to help an officer of a higher rank. Officer on the personal staff of a general, admiral, or other high-ranking commander who acts as a confidential secretary. Today they are usually of junior rank, and their duties are largely social. The term also denotes a high-ranking military officer who acts as an aide to a chief of state