What does the word ensure mean?

Usage examples for ensure

  1. In spite of this, he was conscious of strong sympathy for them and did what he could to ensure their comfort. – Prescott of Saskatchewan by Harold Bindloss
  2. It must be remembered that other conditions being equal, it is an obvious advantage to fight in your own waters rather than in those of the enemy, and more likely to ensure that a defeat of the enemy will be decisive. – Some Principles of Maritime Strategy by Julian Stafford Corbett
  3. It would be worth any amount of trouble to ensure that we always had the best man or men. – Another Sheaf by John Galsworthy