verb (used with object), infringed, infringing.
to commit a breach or infraction of; violate or transgress: to infringe a copyright; to infringe a rule.
verb (used without object), infringed, infringing.
to encroach or trespass (usually followed by on or upon ): Don't infringe on his privacy.

1525–35; < Latin infringere to break, weaken, equivalent to in- in-2 + -fringere, combining form of frangere to break

infringer, noun
uninfringed, adjective

infringe, impinge.

1. break, disobey. 2. poach. See trespass. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
infringe (ɪnˈfrɪndʒ)
1.  (tr) to violate or break (a law, an agreement, etc)
2.  (intr; foll by on or upon) to encroach or trespass
[C16: from Latin infringere to break off, from frangere to break]

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

mid-15c., from L. infringere "to damage, break off," from in- "in" + frangere "to break" (see fraction). Meaning of "encroach" first recorded c.1760.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Packed tightly together, the penguins pecked at neighbors that infringed upon
  their territory.
She too claims her right to a family life has been infringed.
Every one of them is extensively on record: the people's right to keep and bear
  arms shall not be infringed.
The record companies sued, believing that people who copied songs onto media
  players infringed their copyrights.
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