What does the word embrasure mean?

Usage examples for embrasure

  1. At the top a little patch of blue sky was visible, and, in one direction, through an embrasure, he could see foliage, but whether it was beyond or within the temple he did not know. – The Return of Tarzan by Edgar Rice Burroughs
  2. Without replying to me, he made a sign that I might enter, and went into the embrasure of the window. – The Memoirs of Louis XIV., Volume 4 And His Court and of The Regency by Duc de Saint-Simon
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