The Collaborative International Dictionary of English v.0.48:

Layman \Lay"man\n.; pl. Laymen. [Lay, adj. + man.]
   1. One of the people, in distinction from the clergy; one of
      the laity; sometimes, a man not belonging to some
      particular profession, in distinction from those who do.
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            Being a layman, I ought not to have concerned myself
            with speculations which belong to the profession.
                                                  --Dryden.
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   2. A lay figure. See under Lay, n. (above). --Dryden
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