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Meaning of overarch

o•ver•arch

Pronunciation: (ō"vur-ärch'), [key]
— v.t.
  1. to span with or like an arch: A new bridge overarches the river.
—v.i.
  1. to form an arch over something: a cerulean sky overarching in the early twilight.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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