A fast holodeck sport in which two players use phasers to bat a flying disc at each other, played by Janeway and Seven of Nine in Hope and Fear.
Velocity is a competitive game for the holodeck. A hovering disc darts around the room, and each player tries to hit it with a phaser shot so that it changes course and strikes the opponent; a player touched by the disc loses the round. It demands quick reactions and, as Janeway points out, a feel for what the other person will do.
The game is seen at the start of the Voyager episode Hope and Fear. Janeway beats Seven of Nine repeatedly, and Seven, whose reflexes and eyesight are far better, is annoyed that she keeps losing. The argument that follows sets up the episode's concern with how much Seven has learned from her captain.
At the end, the two return to the holodeck for another match, their relationship repaired.