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The concept of describing something "in layman's terms" has come into wide use in the English-speaking world. To put something in layman's terms is to describe a complex or technical issue using words that the average person (so that someone without professional training in the subject area) can understand.
Laity means "common people"; the English word "laity" comes from the Greek laik'l, which meant "of the people" or "common" (i.e. unholy, unclean). The related Greek verb laikoô meant "to make common or desecrate".
See also 
Notes and references 
- "Layman". Oxford English Dictionary Online. Oxford University Press. Retrieved September 27, 2011.