Meaning of buddy system

bud'dy sys"tem

Pronunciation: [key]
  1. (in swimming and scuba diving) the practice of pairing swimmers, each being responsible for the other's safety.
  2. any arrangement whereby two or more persons, teams, etc., watch out for each other, as with mountain climbers.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.