(rugby) the portion of the field which is larger as measured from a scrum or breakdown to the touchline
(rugby) a position in the last row of forwards on that side, more fully open-side flanker, designated with number 7
(rugby) a player in that position
Examples
With the little protruding nubs of the follower caught by your fingernails, its open-side 10-round magazine doesn't fight you when you insert the cartridges.