The name given to the player defending the offensive player with the disc. The mark is responsible for holding the force and for initiating the stall count.

"Disc In" is a statement made by either the offensive player with the disc or the mark letting other players know that the game is live and players may begin making offensive or defensive movements on the field.

The style of systematic offense used in Ultimate where receivers in the field of play will line in an arrangement next to one another to create different lanes on the field for offensive movement.