O
- One Ahead - principle often used in mentalism where the magician uses previously obtained information to stay one step ahead of the audience and supposedly make accurate predictions/guesses.
- One-Handed Cut - a card flourish in which the magician cuts the deck using only one hand.
- Out - an alternative ending to an effect.
- Overhand shuffle - a shuffle where the cards are dropped from one hand into the other in small random groups.
Read more about this topic: Glossary Of Magic (illusion)