A person in a position to use their influence on one’s behalf:I knew that it never hurt to have a friend at court...
I didn't want to say good bye to Bess, for I doubted that I would have such a friend at court.
We had a friend at court, one that secured for me two meetings with Harold Wilson.
In master Daniel I had a friend at court, who would sometimes give me a cake, and who kept me well informed as to their guests and their entertainments.