footprint

Concise Oxford English Dictionary © 2008 Oxford University Press:
footprint/ˈfʊtprɪnt/

▶noun

• 1 the impression left by a foot or shoe on the ground.

• 2 the impact on the environment of human activity in terms of pollution, damage to ecosystems, and the depletion of natural resources.

• 3 the area in which a broadcast signal can be received.

• 4 the area beneath an aircraft or a land vehicle which is affected by its noise or weight.

• 5 Computing the space taken up on a surface by a piece of hardware.