1. A prominent identifying feature of a landscape.
2. A fixed marker, such as a concrete block, that indicates a boundary line.
3. An event marking an important stage of development or a turning point in history.
4. A building or site with historical significance, especially one marked for preservation by a municipal or national government.
Having great import or significance: a landmark court ruling.
tr.v. land·marked, land·mark·ing, land·marks
To accord the status of a landmark to; declare to be a landmark.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. 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.