Source : Webster's Revised Unabridged Dictionary (1913)

Overload \O`ver*load"\, v. t. [imp. & p. p. {Overloaded}; p. pr.
   & vb. n. {Overloading}.] [Cf. {Overlade}.]
   To load or fill to excess; to load too heavily.

Source : WordNet®

overloaded
     adj : loaded past capacity [syn: {overladen}]