What does the word S mean?

Usage examples for S

  1. I sent off Hispa instantly to Strabo; not an hour's delay after I heard of it. – Callista by John Henry Cardinal Newman
  2. Wind cold S. E. and E. The day as dull and dreary as in England. – Travels in the Great Desert of Sahara, in the Years of 1845 and 1846 by James Richardson
  3. And Kate was the only woman at the Bar S ranch. – Paradise Bend by William Patterson White