out·build·ing /ˈaʊtˌbɪldɪŋ/
外屋
Out·build v. t. [imp. & p. p. Outbuilt or Outbuilded; p. pr. & vb. n. Outbuilding.] To exceed in building, or in durability of building.
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Out·build·ing n. A building separate from, and subordinate to, the main house; an outhouse.
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outbuilding
n : a building that is subordinate to and separate from a main
building