Source : Webster's Revised Unabridged Dictionary (1913)

Overlie \O`ver*lie"\, v. t. [imp. {Overlay}; p. p. {Overlain};
   p. pr. & vb. n. {Overlying}.]
   To lie over or upon; specifically, to suffocate by lying
   upon; as, to overlie an infant. --Quain.

         A woman by negligence overlieth her child in her
         sleeping.                                --Chaucer.

Overlying \O`ver*ly"ing\, a.
   Lying over or upon something; as, overlying rocks.

Source : WordNet®

overlie
     v 1: lie upon; lie on top of; "the granite overlies the older
          rocks"
     2: kill by lying on; "The sow overlay her piglets" [syn: {overlay}]
     [also: {overlying}, {overlay}, {overlain}]

overlying
     adj : placed on or over something else; "an overlying image" [syn:
            {superimposed}]

overlying
     See {overlie}