Definify.com

Webster 1913 Edition

Adj.

Having an even lower surface or bottom;

as, a

flat-bottomed

boat

Adj.

Having a flat bottom, as a boat, or a moat in fortification.

See also: flatbottomed and flat bottomed

flat-bottomed ‎(comparative more flat-bottomed, superlative most flat-bottomed)

having a flat bottom