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n. pl. gen·tle·men-at-arms (-mən-)
One of a military corps of 40 gentlemen who attend the British sovereign as a ceremonial guard on state occasions.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.