What does the word invigorate mean?

Usage examples for invigorate

  1. I continued from time to time to see the mother, and administered such medicines as I deemed necessary to invigorate and tone up the patient's system for the operation. – At the Mercy of Tiberius by August Evans Wilson
  2. Four years ago we said we would invigorate our economy by giving people greater freedom and incentives to take risks and letting them keep more of what they earned. – State of the Union Addresses of Ronald Reagan by Ronald Reagan