The Collaborative International Dictionary of English v.0.48:
Lay \Lay\, a. [F. lai, L. laicus, Gr. ? of or from the people,
lay, from ?, ?, people. Cf. Laic.]
1. Of or pertaining to the laity, as distinct from the
clergy; as, a lay person; a lay preacher; a lay brother.
2. Not educated or cultivated; ignorant. [Obs.]
3. Not belonging to, or emanating from, a particular
profession; unprofessional; as, a lay opinion regarding
the nature of a disease.
Lay baptism (Eccl.), baptism administered by a lay person.
--F. G. Lee.
Lay brother (R. C. Ch.), one received into a convent of
monks under the three vows, but not in holy orders.
Lay clerk (Eccl.), a layman who leads the responses of the
congregation, etc., in the church service. --Hook.
Lay days (Com.), time allowed in a charter party for taking
in and discharging cargo. --McElrath.
Lay elder. See 2d Elder, 3, note.
Bouvier's Law Dictionary, Revised 6th Ed (1856):
LAY DAYS, mar. law. The time allowed to the master of a vessel for loading
and unloading the same. In the absence of any custom to the contrary,
Sundays are to be computed in the calculation of lay days at the port of
discharge. 10 Mees. & Wels. 331. See 3 Esp. 121. They differ from demurrage.