What does the word twenty mean?

Usage examples for twenty

  1. It's a walk of twenty minutes to the station. – Man and Wife by Wilkie Collins
  2. For a woman of twenty- three is very young. – The Port of Adventure by Charles Norris Williamson and Alice Muriel Williamson
  3. I'll be there in twenty minutes. – Rats in the Belfry by John York Cabot