What does the word lining mean?

Usage examples for lining

  1. Guffey had advised him not to make notes, for fear of detection, but Peter could not carry all this in his head, so he would retire to his room and make minute notes on slips of paper, and carefully sew these up in the lining of his coat, with a thrill of mystery. – 100%: The Story of a Patriot by Upton Sinclair
  2. Dr. Reasono showed me the certificate issued from the Marriage Department on this occasion, and which, in all his wanderings, he had contrived to conceal within the lining of the Spanish hat the Savoyards had compelled him to wear, and which he still preserved as a document that was absolutely indispensable on his return to Leaphigh; else he would never be permitted to travel afoot in company with two young people of birth and of good estates, who were of the different sexes. – The Monikins by J. Fenimore Cooper
  3. Inside the hull lining. – The Colors of Space by Marion Zimmer Bradley