The Collaborative International Dictionary of English v.0.48:
Surcharge \Sur*charge"\, v. t. [imp. & p. p. Surcharged; p.
pr. & vb. n. Surcharging.] [F. surcharger. See Sur-, and
Charge, and cf. Overcharge, Supercharge, Supercargo.]
1. To overload; to overburden; to overmatch; to overcharge;
as, to surcharge a beast or a ship; to surcharge a cannon.
Four charged two, and two surcharged one. --Spenser.
Your head reclined, as hiding grief from view,
Droops like a rose surcharged with morning dew.
(a) To overstock; especially, to put more cattle into, as
a common, than the person has a right to do, or more
than the herbage will sustain. Blackstone.
(b) (Equity) To show an omission in (an account) for which
credit ought to have been given. --Story. Daniel.
3. To print or write a surcharge on (a postage stamp).
[Webster 1913 Suppl.]