n. A massless gauge boson that binds quarks together to form baryons, mesons and other hadrons and is associated with the strong nuclear force.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a gauge boson that mediates strong interaction among quarks
Word Usage
"One of the bosons there are four flavours sticks them together and is called a gluon, which sounds like glue and is therefore probably the easiest concept out of all of this comprehend."