What does the word fortify mean?

Usage examples for fortify

  1. This storm, if it broke over the valley, promised to be almost a flood, and would not only replenish the water supply, but would fortify the range for quite a while against the merciless sun. – Hopalong Cassidy by Clarence E. Mulford
  2. Now she melted, indeed, and suffered Charmian to moan over her, and fortify her with all the reasons she had urged herself in various forms of repetition. – The Coast of Bohemia by William Dean Howells