hollow (http://definr.com/hollow)

     adj 1: not solid; having a space or gap or cavity; "a hollow wall";
            "a hollow tree"; "hollow cheeks"; "his face became
            gaunter and more hollow with each year" [ant: solid]
     2: deliberately deceptive; "hollow (or false) promises"; "false
        pretenses" [syn: false]
     3: as if echoing in a hollow space; "the hollow sound of
        footsteps in the empty ballroom"
     4: devoid of significance or point; "empty promises"; "a hollow
        victory"; "vacuous comments" [syn: empty, vacuous]
     n 1: a cavity or space in something; "hunger had caused the
          hollows in their cheeks"
     2: a small valley between mountains; "he built himself a cabin
        in a hollow high up in the Appalachians" [syn: holler]
     3: a depression hollowed out of solid matter [syn: hole]
     v 1: remove the inner part or the core of; "the mining company
          wants to excavate the hillsite" [syn: excavate, dig]
     2: remove the interior of; "hollow out a tree trunk" [syn: {hollow
        out}, core out]