The Collaborative International Dictionary of English v.0.48:

Bottom \Bot"tom\, v. t. [imp. & p. p. Bottomed (?); p. pr. &
   vb. n. Bottoming.]
   [1913 Webster]
   1. To found or build upon; to fix upon as a support; --
      followed by on or upon.
      [1913 Webster]

            Action is supposed to be bottomed upon principle.
                                                  --Atterbury.
      [1913 Webster]

            Those false and deceiving grounds upon which many
            bottom their eternal state].          --South.
      [1913 Webster]

   2. To furnish with a bottom; as, to bottom a chair.
      [1913 Webster]

   3. To reach or get to the bottom of. --Smiles.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bottomed \Bot"tomed\, a.
   Having at the bottom, or as a bottom; resting upon a bottom;
   grounded; -- mostly, in composition; as, sharp-bottomed;
   well-bottomed.
   [1913 Webster]

WordNet (r) 3.0 (2006):

bottomed
    adj 1: having a bottom of a specified character [ant:
           bottomless]