From The Collaborative International Dictionary of English v.0.48 [gcide]:
Down \Down\, v. t. [imp. & p. p. Downed; p. pr. & vb. n.
Downing.]
To cause to go down; to make descend; to put down; to
overthrow, as in wrestling; hence, to subdue; to bring down.
[Archaic or Colloq.] "To down proud hearts." --Sir P. Sidney.
[1913 Webster]
I remember how you downed Beauclerk and Hamilton, the
wits, once at our house. --Madame
D'Arblay.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
Downing
n 1: United States landscape architect who designed the grounds
of the White House and the Capitol Building (1815-1852)
[syn: Downing, Andrew Jackson Downing]