What does the word silk mean?

Usage examples for silk

  1. It is as fine as silk. – Whosoever Shall Offend by F. Marion Crawford
  2. It's as hard and fine as silk. – The Gloved Hand by Burton E. Stevenson
  3. " And even for that you should not hate me," he said, shaking his head on the silk pillows. – Romance by Joseph Conrad and F.M. Hueffer