noun

the atmosphere of the Earth and the space beyond it

noun

the space around things and above the ground

noun

the air round the Earth or round another planet

adjective

relating to or existing in the atmosphere round the Earth or round another planet

noun

the parts of the Earth’s surface and atmosphere where plant and animal life can exist

noun

the distance from the surface of the Earth to the lowest clouds

noun

the air or atmosphere, especially when you are talking about it as the substance that radio, telephone, or Internet communications pass through

noun

the upper part of the atmosphere, far above the clouds

noun

the part of the Earth’s atmosphere through which radio waves can be sent

noun

a kind of oxygen that exists high in the Earth’s atmosphere

noun

a layer of ozone in the Earth’s atmosphere that protects the Earth from the heat of the sun. Pollution in the air has caused holes to appear in the ozone layer.

noun

the part of the Earth’s atmosphere that is 10 km to 50 km above the surface

adjective