I have been a magician for a relatively long time, and started making public performances in local areas.
(Don't be too impressed, i am nothing compared big-time magicians and illusionists like David Copperfield/Chris Angel for example)
Through my experiences in these performances, I will attempt an accurate definition of sleight of hand
in terms of someone who has relied on its mechanics for years.
Sleight of Hand is basically a tool used by magicians in order to complete a task in a secretive manner by way of techniques involving
the hands. Simply put, magicians need ways of accomplishing things without the spectator knowing what is going on. This in turn
leads the spectator to believe one thing is happening, when in reality something completely different is going on. This concept is the
basis for most tricks. Let's give an example. Suppose you want to have a spectator pick a card from a deck. The spectator does, memorizes it,
and replaces it on the top of the deck. You claim you are going to shuffle the deck... and the spectator visually sees you shuffling the deck.
That is what you want the spectator to believe... when in reality, you have shuffled the card to the bottom of the deck. The spectator believes
that all the cards are mixed, and their card is undetectable. You know already where the card is. This simple trick applies the basic concepts above.
We'll come back to this example in a bit and 'finish the trick off'.
There are MANY different sleight of hand techniques. The example trick above uses the technique of "False Shuffling". False shuffling forces the spectator
to believe the cards in a deck are mixed, when in reality, the magician may know where one, two, or even all the cards are in the deck! Another technique
that magicians use is called 'Misdirection'. Now, misdirection is not necessarily a Sleight of Hand Technique, but it is often used when the magician is about to complete a sleight. Let's take our example trick above. The magician knows the card on the bottom of the deck is the spectator's card. The magician tells the spectator to take the card box that the deck was in (let's assume that the magician and spectator are sitting at a table, and card box is on the table), and to
hold it tight so the spectator can 'focus' on his card easily. The spectator now is focused on taking the card box... a simple misdirection to get his attention off of
the magician. The magician then secretly "palms" the bottom card. Palming is another Sleight of Hand technique where the magician hides a card from view by
cupping it in his palm (this is only one type of palming). Once the spectator has the card box, the magician hands the deck to the spectator and asks him to look
at the top card. The spectator sees that this card is not his chosen card. The magician then takes the deck, and places his hand (with the palmed card) on top of it
(dropping the palmed card on the top... this could be considered another sleight of hand move). The magician says some magic words, reveals the top card, and it
is the spectator's card!
See, the spectator believes he saw one thing, but the magician knows he did something else. This is the basis for many tricks, complimented by the
techniques of sleight of hand!
Hope that helps!

