The definition of semper fidelis, the motto of the U.S. Marines, is always faithful.adjective
An example of semper fidelis is a motto meaning "always faithful."YourDictionary definition and usage example. Copyright © 2013 by LoveToKnow Corp.
Origin: L < IE base *sem-, one, uniform, same + *per > per
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semper fidelis - Cultural Definition
Latin for “always faithful”; the motto of the United States Marine Corps.