Definition of parlance noun from the Oxford Advanced Learner's Dictionary

 

parlance

 noun
noun
BrE BrE//ˈpɑːləns//
 
; NAmE NAmE//ˈpɑːrləns//
 
[uncountable](formal)
 
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a particular way of using words or expressing yourself, for example one used by a particular group in common/legal/modern parlance A Munro, in climbing parlance, is a Scottish mountain exceeding 3 000 feet. The word ‘modem’ entered common parlance in the 1990s. Word Origin late 16th cent. (denoting speech or debate): from Old French, from parler ‘speak’, from Latin parabola ‘comparison’ (in late Latin ‘speech’).
See the Oxford Advanced American Dictionary entry: parlance