B1[C]a single thing or a separate part of something larger: The first year of the course is divided into four units.Each unit of the course book focuses on a different grammar point.Words meaning parts of things›[C]a piece of furniture or equipment that is intended to be fitted as a part of a set of similar or matching pieces: kitchen/shelf/sink unitsFurniture and fittings - general words›[C]a small machine or part of a machine that has a particular purpose: the central processing unit of a computera waste-disposal unitMachinery and machinesHousehold equipment and domestic choresMachine parts›[C]specializeda single complete product of the type that a business sellsSingle, double and multipleProducts and producersBuying and selling in general›[C]USa single apartment in a bigger building: a multiple-unit dwellinga public housing unitHouses and homes