What does the word heave mean?

Usage examples for heave

  1. His orders had been to carry on and only heave- to upon signal. – Foe-Farrell by Arthur Thomas Quiller-Couch
  2. He placed the pick between two stones and began to heave at the handle. – The Birthright by Joseph Hocking
  3. We went to work for ten hours on end, laying out anchors in readiness to heave off at high water. – The Mirror of the Sea by Joseph Conrad