What does the word insure mean?

Usage examples for insure

  1. On the other hand, my poor good uncle, the wisest thing he ever did, made me insure my life for 5000, pounds so there will be 150 pounds a year to depend on, besides what we had of our own, only 2350 pounds left of it now. – The Pillars of the House, V1 by Charlotte M. Yonge
  2. I then employed the little fund I had acquired to stock a farm, which I hired in the neighbourhood, and where I imagined my care and industry would be sufficient to insure us all a comfortable subsistence. – The History of Sandford and Merton by Thomas Day