1. verb /leɪ/
a) To place something down in a position of rest.
Now I lay me down to sleep, / I pray the Lord my Soul to keep. / If I should die before I ’wake, / I pray the Lord my Soul to take.
The cloudes, as things affrayd, before him flye; / But all so soone as his outrageous powre / Is layd, they fiercely then begin to shoure [...].
2. noun /leɪ/
a) Arrangement or relationship; layout.
the lay of the land (rather than the standard the lie of the land)
3. adjective /leɪ/
a) Non-professional; not being a member of an organized institution.
They seemed more lay than clerical.
b) Not belonging to the clergy, but associated with them.
Wikipedia foundation.