What does the word grasp mean?

Usage examples for grasp

  1. She was very tired, she had never felt quite so tired before, and her knees trembled as they had done that day when the fever came on at the convent; she was so dizzy too, that she had to stop now and then, to grasp the one fact of her being where she was and not somewhere else altogether; her single idea was to go on walking until- until when? – My Little Lady by Eleanor Frances Poynter
  2. Nick was a great comfort to her in those days, but she felt that even he did not wholly grasp the difficulties of the situation. – The Keeper of the Door by Ethel M. Dell
  3. The keeper's grasp relaxed, he fell heavily to the ground, and Saurin was free. – Dr. Jolliffe's Boys by Lewis Hough