From WordNet (r) 2.0 (August 2003) [wn]:
floored
adj : provided with a floor [ant: ceilinged]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
floored \floored\ adj.
1. provided with a floor. ceilinged
[WordNet 1.5]
2. knocked down to the floor or ground.
[PJC]
3. defeated; overwhelmed.
[PJC]
4. suprised and confounded; nonplused; as, I was floored by
the brilliance of the solution.
[PJC]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Floor \Floor\, v. t. [imp. & p. p. Floored; p. pr. & vb. n.
Flooring.]
1. To cover with a floor; to furnish with a floor; as, to
floor a house with pine boards.
[1913 Webster]
2. To strike down or lay level with the floor; to knock down;
hence, to silence by a conclusive answer or retort; as, to
floor an opponent.
[1913 Webster]
Floored or crushed by him. --Coleridge.
[1913 Webster]
3. To finish or make an end of; as, to floor a college
examination. [Colloq.]
[1913 Webster]
I've floored my little-go work. --T. Hughes.
[1913 Webster]