Definitions
1.nounA throng or crowd of people or things; a mass, a pack.
2.nounIn Australian rules football
3.nounThe situation formed when a player carrying the ball is brought to the ground and one or more members of each side are engaged above the ball, trying to win possession of it; a loose scrum.
4.nounThe common mass of people or things; the ordinary ranks.
5.verbTo act as a ruck in a stoppage in Australian rules football.
6.verbTo contest the possession of the ball in a ruck.