What does the word profound mean?

Usage examples for profound

  1. He cared for her no more and was at no pains to conceal the fact, which she on her part recognized with profound relief. – The Keeper of the Door by Ethel M. Dell
  2. However, I step'd upon Deck to see how Things went; there was a profound Silence every where, the Passengers were scatter'd here and there looking one at another, but not speaking a Word; the Master was walking with his Arms across without Fear, but not without Concern in his Countenance: I ask'd him how he came to be mistaken in the Tyde? – Memoirs of Major Alexander Ramkins (1718) by Daniel Defoe
  3. The hot silence was profound. – The Garden Of Allah by Robert Hichens
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