What does "fife" mean?

Fife: A small shrill pipe, resembling the piccolo flute, used chiefly to accompany the drum in military music. Fife major (Mil.), a noncommissioned officer who superintends the fifers of a regiment. -- Fife rail. (Naut.) (a) A rail about the mast, at the deck, to hold belaying pins, etc. (b) A railing around the break of a poop deck.