What does the word chum mean?

Usage examples for chum

  1. " Perhaps Mr. Bartholomew's police are really of some good," said Ned Newton, when his chum mentioned his surprise on this point. – Tom Swift and his Electric Locomotive or, Two Miles a Minute on the Rails by Victor Appleton
  2. After Jack, it is my best and dearest chum! – The Lightning Conductor Discovers America by C. N. (Charles Norris) Williamson and A. M. (Alice Muriel) Williamson
  3. Even to his sister Harold was abrupt and harsh, but Jack's devotion produced in him the most exalted emotion, and he turned upon his loyal chum the whole force of his affectionate nature. – The Eagle's Heart by Hamlin Garland