A framework of parallel or crossed bars, typically preventing access through an opening while allowing light and air to pass. The basement window was covered with a metal grating to keep out intruders.
A structure made of metal bars or wires, used to cover a drain or opening. The rainwater flowed through the grating into the sewer below.
A device used in physics to disperse light into a spectrum or to analyze the spectrum of light. The scientist used a diffraction grating to study the properties of the light spectrum.
A scraping or grinding sound. The grating of metal on metal made everyone wince.