One who helps; an aide; assistant; auxiliary.
That which helps; anything serving to assist.
A locomotive that assists a train, usually on steep gradients.
A person who does cleaning and cooking in a family home, or in a market; domestic employee.
A commissioned officer in the United States Coast Guard, Public Health Service, or National Atmospheric and Oceanic Administration whose rank is above an ensign and below a lieutenant.
A commissioned officer of the United States Navy whose rank is above an ensign's and below a lieutenant, or a corresponding rank in other navies.