Definitions of deputy
The deputy Speaker is in charge of the proceedings of the House of Commons in the absence of the Speaker.
a person who takes on the duties of a superior when that superior is away
the person whose position is immediately below that of the leader of an organisation and who sometimes takes on the leader's responsibilities
Department head Helen Smith and her deputy David Mitchell have both resigned.
used in job titles
Deputy Prime Minister Rasim Ljajic condemned the ruling.