1. An outline or indentation left by a foot on a surface. Also called footmark, footstep.
2. The surface space occupied by a structure or device: the footprint of a building.
a. The impact that a particular activity, person, or group has on the environment.
b. See carbon footprint.
c. The area affected or covered by a device or phenomenon: the footprint of a communications satellite.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.