What does "serving" mean?

Serving: a & n. from Serve. Serving board (Naut.), a flat piece of wood used in serving ropes. -- Serving maid, a female servant; a maidservant. -- Serving mallet (Naut.), a wooden instrument shaped like a mallet, used in serving ropes. -- Serving man, a male servant, or attendant; a manservant. -- Serving stuff (Naut.), small lines for serving ropes.