a. A horizontal crosspiece over a door or between a door and a window above it.
b. A small hinged window above a door or another window.
2. A horizontal dividing bar of wood or stone in a window.
3. A lintel.
a. The stern of a square-sterned boat or ship.
b. Any of several transverse beams affixed to the sternpost of a wooden ship and forming part of the stern.
c. The aftermost transverse structural member in a steel ship, including the floor, frame, and beam assembly at the sternpost.
5. The horizontal beam on a cross or gallows.
over the transom
Without being agreed to; unsolicited: They even publish a few manuscripts that come in over the transom.
[Middle English traunsom, probably alteration of Latin trānstrum, cross-beam, from trāns, across; see TRANS-.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 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.