What does the word bellows mean?

Usage examples for bellows

  1. As a child, from early sunrise till nearly midnight, I blew the bellows for eighteen pence a week. – Aylwin by Theodore Watts-Dunton
  2. Nick pulled the stool up closer, and sat down in the chimney- corner, humming a second to the tune, and blowing little glory- holes in the embers with the bellows. – Master Skylark by John Bennett
  3. Above me was the bellows- top, to keep off the rain. – Rollo in Geneva by Jacob Abbott