an·ti-def·a·ma·tion | \ ˌan-tē-ˌde-fə-ˈmā-shən 
, ˌan-tī- \
, ˌan-tī- \variants:
or less commonly antidefamation
Definition of anti-defamation
: opposing or preventing defamation anti-defamation laws
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Time Traveler for anti-defamation
The first known use of anti-defamation was in 1913
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