【上位】 an open or empty space in or between things; "there was a small opening between the trees"; "the explosion made a gap in the wall" 物の内部または間の空間あるいは隙間。
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【下位】 (geology) a crack in the earth's crust resulting from the displacement of one side with respect to the other; "they built it right over a geological fault"; "he studied the faulting of the earth's crust" 片側が他方に対してずれた、地殻の断裂。
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【下位】 a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt 溶岩とガスが噴出する地殻（あるいは他の惑星の表面）の裂け目。
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【下位】 a crack in a lip caused usually by cold 通常、寒さからくる唇のひび。
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【下位】 a narrow opening as e.g. between planks in a wall 壁の板の間のような狭い隙間。
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