Question

definition of garbage and waste

Answer 1

A garbage disposal unit is a device, usually electrically powered, installed under a kitchen sink between the sink's drain and the trap. The disposal unit shreds food waste into pieces small enough—generally less than 2 mm —to pass through plumbing.
Waste are unwanted or unusable materials. Waste is any substance which is discarded after primary use, or is worthless, defective and of no use. Examples include municipal solid waste, hazardous waste, wastewater, radioactive waste, and others. 

Answer 2

Wastes' are substance or objects, which are disposed of or are intended to be disposed of or are required to be disposed of by the provisions of national law"
garbage..a device in a kitchen sink that grinds up food waste so it can be washed down the drain