hollow

1. Not solid;
   Having a space or gap or cavity (synset 302271738)
   "a hollow wall"; "a hollow tree"; "hollow cheeks"; "his face became gaunter and more hollow with each year"
   also: empty - holding or containing nothing
   tells us about: solidity - state of having the interior filled with matter
   similar to:

   • cavernous - being or suggesting a cavern
   • deep-set, recessed, sunken - having a sunken area
   • fistular, fistulate, fistulous - hollow and tube-shaped like a reed
   • cannular, tube-shaped, tubelike, tubular, vasiform - constituting a tube; having hollow tubes (as for the passage of fluids)
2. As if echoing in a hollow space (synset 302017223)
   "the hollow sound of footsteps in the empty ballroom"
   similar to: reverberant - having a tendency to reverberate or be repeatedly reflected
3. Devoid of significance or force (synset 301501421)
   "empty promises"; "a hollow victory"; "vacuous comments"
   similar to: meaningless, nonmeaningful - having no meaning or direction or purpose
   same as: empty, vacuous
4. Lacking in substance or character (synset 300629437)
   "a hollow person"
   similar to: insubstantial, unreal, unsubstantial - lacking material form or substance; unreal

1. A cavity or space in something (synset 113933910)
   "hunger had caused the hollows in their cheeks"
   is a type of: cavity, enclosed space - space that is surrounded by something
2. A small valley between mountains (synset 109327937)
   "he built himself a cabin in a hollow high up in the Appalachians"
   is a type of: vale, valley - a long depression in the surface of the land that usually contains a river
   subtypes: dell, dingle - a small wooded hollow
   same as: holler
3. A depression hollowed out of solid matter (synset 109327656)
   is a type of: depression, natural depression - a sunken or depressed geological formation
   subtypes:

   • burrow, tunnel - a hole made by an animal, usually for shelter
   • gopher hole - a hole in the ground made by gophers
   • kettle, kettle hole - (geology) a hollow (typically filled by a lake) that results from the melting of a mass of ice trapped in glacial deposits
   • cavity, pit - a sizeable hole (usually in the ground)
   • chuckhole, pothole - a pit or hole produced by wear or weathering (especially in a road surface)
   • rabbit burrow, rabbit hole - a hole in the ground as a nest made by wild rabbits
   • wormhole - hole made by a burrowing worm
   same as: hole

1. Remove the inner part or the core of (synset 201313320)
   "the mining company wants to excavate the hillside"
   is a type of: remove, take, take away, withdraw - remove something concrete, as by lifting, pushing, or taking off, or remove something abstract
   subtypes:

   • drive - excavate horizontally
   • ditch, trench - cut a trench in, as for drainage
   same as: dig, excavate
2. Remove the interior of (synset 201285148)
   "hollow out a tree trunk"
   is a type of: empty - make void or empty of contents
   subtypes:

   • gouge, rout - make a groove in
   • scallop, scollop - form scallops in
   • hole - make holes in
   • draw in, suck in - draw in as if by suction
   • scoop out - hollow out with a scoop
   • cavern, cavern out - hollow out as if making a cavern
   • cave, undermine - hollow out as if making a cave or opening
   • dig, dig out - create by digging
   • excavate - form by hollowing
   • core - remove the core or center from
   same as: core out, hollow out

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