1. A gate having projecting bars that can be rotated to allow one person at a time to pass through, often having a mechanism to allow passage only in one direction or to require payment, as by means of a token.
2. A gate controlling access to a space by another mechanical or electronic means, as by panels that slide out of the way when a card is swiped.
(click for a larger image)turnstile
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.