Source : Webster's Revised Unabridged Dictionary (1913)

Overstay \O`ver*stay"\, v. t. [imp. & p. p. {Overstayed}or
   {Overstaid}; p. pr. & vb. n. {Overstaying}.]
   To stay beyond the time or the limits of; as, to overstay the
   appointed time. --Bp. Hall.

Source : WordNet®

overstay
     v : stay too long; "overstay or outstay one's welcome" [syn: {outstay}]