An outlying part of a city or town; a smaller place immediately adjacent to a city; in the plural, the region which is on the confines of any city or large town; as, a house stands in the suburbs; a garden situated in the suburbs of Paris
If you live in the suburbs, you live in an area of houses outside the centre of a large town or city. His family lived in the suburbs. Bombay's suburbs. an area where people live which is away from the centre of a town or city (suburbium, from urbs )
A suburb of a city or large town is a smaller area which is part of the city or large town but is outside its centre. Anna was born in 1923 in Ardwick, a suburb of Manchester