Ozone layer definition, the layer of the upper atmosphere where most atmospheric ozone is concentrated, from about 8 to 30 miles (12 to 48 km) above the earth, with the maximum ozone concentration occurring at an altitude of about 12 miles (19 km). The stratosphere gets its name because it is stratified, or layered: as elevation increases, the stratosphere gets warmer.

The stratosphere is the mass of protective gases cling ing to our planet. ozone layer. n. A region of the atmosphere lying mostly in the stratosphere, between about 15 and 30 kilometers (10 and 20 miles) in altitude, containing a relatively high concentration of ozone that absorbs solar ultraviolet radiation in a wavelength range not screened by other atmospheric components. The ozone layer is one layer of the stratosphere, the second layer of the Earth’s atmosphere.

The ozone layer protects living things from the harmful radiation of the sun.

The ozone layer protects living things from the harmful radiation of the sun. Ozone layer definition is - an atmospheric layer at heights of about 20 to 30 miles (32 to 48 kilometers) that is normally characterized by high ozone content which blocks most solar ultraviolet radiation from entry into the lower atmosphere. The ozone layer is the part of the Earth's atmosphere that has the most ozone in it.