A double jump was a Force assissted jump that involves two 'steps' to allow somone to travel higher/further.

Star Wars: Episode I Jedi Power BattlesEdit

This is the same as a single jump, except double. It can be done in Star Wars: Episode I Jedi Power Battles. However, your character sticks in the air like petroleum jelly when you do this.

LEGO Star Wars seriesEdit

In the LEGO Star Wars series the player could hit jump twice as a Jedi to double jump.