What does the word lather mean?

Usage examples for lather

  1. She came up to the Sawtooth ranch- houses with Snake in a lather of sweat and with her own determination unweakened to carry the war into the camp of her enemy. – Sawtooth Ranch by B. M. Bower
  2. A good lather is applied all over the body with good friction by the means of a shampoo brush and soap. – The Mother and Her Child by William S. Sadler Lena K. Sadler