: to bring or summon together into a group esp. in a particular place for a particular purpose
: to come or meet together in a group often formally or for a common purpose [the right of the people peaceably to "U.S. Constitution amend. I"]
Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.