from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A line of people formed to fight a fire by passing buckets of water from a source to the fire.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A primitive firefighting technique, in which a long line of people pass buckets of water hand-to-hand from the nearest water source to the site of a fire, in an attempt to douse it.
- n. By extension, any process in which something is passed along a chain.
Sorry, no etymologies found.