Definition - What does Infringement mean?
Infringement is a term that generally means illegal entering or trespassing. In law, this term particularly means violation of a right or a law whether intentionally or unintentionally. Infringement may include property infringement, patent infringement, copyright infringement, trademark infringement and more.
Justipedia explains Infringement
Infringement occurs on improper usage of patent, graphic, writing or trademark without prior notice. It may be the case that infringement is accidental or unintentional (in a case where an inventor of a certain widget thinks that he is the actual developer while someone already has a patent of the same thing) but the party infringing will be responsible to pay the damages.