What does the word casement mean?

Usage examples for casement

  1. How sweetlie the Moon shines through my Casement to- night! – Mary Powell & Deborah's Diary by Anne Manning
  2. Not suspecting that my grandfather would see me, or seeing me guess my intention, I went down the beech- tree avenue; but I had not gone ten steps, when the arched casement was thrown open, and Mr. Thornton appeared in the aperture, grim and forbidding. – Daisy Burns (Volume 2) by Julia Kavanagh
  3. Here, had she wanted to do any casement work with a white rose, like that earlier heroine, she could easily have managed it had not the early morning been so feverishly occupied in reaching the lot in time to be made up by nine. – Gigolo by Edna Ferber