/ ˈpɑːləns; NAmE ˈpɑːrl-/ noun
[ U ] ( formal ) 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.
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WORD ORIGIN
late 16th cent. (denoting speech or debate): from Old French , from parler speak, from Latin parabola comparison (in late Latin speech).