having an extremely bad reputation: an infamous city.
deserving of or causing an evil reputation; shamefully malign; detestable: an infamous deed.
deprived of certain rights as a citizen, as a consequence of conviction of certain offenses.
of or pertaining to offenses involving such deprivation.

1350–1400; Middle English < Latin infām(is) (see infamy) + -ous

infamously, adverb
infamousness, noun

famous, infamous, notorious (see synonym study at famous).

1. disreputable, ill-famed, notorious. 2. disgraceful, scandalous; nefarious, odious, wicked, shocking, vile, base, heinous, villainous.

1. reputable. 2. praiseworthy, admirable. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
infamous (ˈɪnfəməs)
1.  having a bad reputation; notorious
2.  causing or deserving a bad reputation; shocking: infamous conduct
3.  Criminal law,
 a.  (of a person) deprived of certain rights of citizenship on conviction of certain offences
 b.  (of a crime or punishment) entailing such deprivation

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

late 14c., from M.L. infamosus, from L. in- "not" + famosus "celebrated." Meaning infl. by L. infamis "of ill fame," from in- "not, without" + fama "reputation." As a legal term, "disqualified from certain rights of citizens in consequence of conviction of a crime" (late 14c.). Infamy is late 15c., from
O.Fr. infamie, from L. infamia.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
No crime is more infamous than the violation of truth.
The recording industry and movie industry are infamous for stealing money from artists.
Hedge funds are infamous for being scrappy and secretive.
Infamous crime, however, is not further explained or defined in that provision.
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