Definition of secret service
1
: a governmental service of a secret nature
2
capitalized both Ss
: a division of the U.S. Department of Homeland Security chiefly in charge of stopping crimes against the nation's financial system and protecting the president and other national officials and visiting world leaders
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Merriam-Webster unabridged
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Time Traveler for secret service
The first known use of secret service was in 1706
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