<p><strong>Noun</strong></p><ul><li>a mark left by the shod or unshod foot, as in earth or sand</li><li>an impression of the sole of a person's foot, especially one taken for purposes of identification</li><li>Informal. the track of a tire, especially on wet pavement</li><li>a unique set of characteristics, actions, etc., that leave a trace and serve as a means of identification: Be careful when you post on social media—your online footprint could harm your reputation</li><li>the area affected by an increase in the level of sound or noise, as that generated by an airplane</li><li>Telecommunications. the area of the earth's surface within which a communications satellite's signals can be received</li><li>Aerospace. the area within which it is predicted that a spacecraft or its debris will land</li><li>the surface space of a desk or tabletop occupied by a piece of equipment, especially a computer or other electronic device</li><li>the surface area occupied by any structure, device, etc.: The new store will have a large footprint</li><li>the impact that humans have on the environment, especially in the utilization of natural resources: China's water footprint; ways to reduce our environmental footprint</li><li>any impact or effect, or its scope: the company’s wide footprint</li><li>also called ecological footprint</li><li>the amount of biologically productive land and ocean area required to sustain the resource consumption and waste production of an individual, population, or human activity: measured in global acres or hectares</li><li>Computers. the amount of memory or disk space required by a program</li></ul>