- figure eight.
- a knot resembling the figure 8.
- an outline of the number 8 traced on ice by a skater
- a flight manoeuvre by an aircraft outlining a figure 8
- a knot in the shape of a figure 8 made to prevent the unreeving of a rope
- a climber's knot in the shape of a figure 8 made with a doubled rope to provide a secure loop
- an angler's knot sometimes used to attach a fly to a leader or dropper
