Parkour is an art form of human movement, focusing on uninterrupted, efficient forward motion over, under, around and through obstacles (both man-made and natural) in one's environment. Such movement may come in the form of running, jumping, climbing and other more complex techniques.
The goal of practicing le parkour is to be able to adapt one's movement to any given scenario so that any obstacle can be overcome with the human body's abilities.

According to founder David Belle, the "spirit" of parkour is guided in part by the notions of "escape" and "reach" that is, the idea of using physical agility and quick thinking to get out of difficult situations, and to be able to go anywhere that one desires.\
nHowever, fluidity and beauty are also important considerations; for example, S?bastien Foucan, a traceur who trained with David Belle during the infancy of the art speaks of being "fluid like water," a frequently used metaphor for the smooth passage of barriers through the use of parkour.
Similarly, experienced traceur (parkour practitioner) Jerome Ben Aoues explains in the documentary Jump London that:
"The most important element is the harmony between you and the obstacle; the movement has to be elegant ….If you manage to pass over the fence elegantly - that's beautiful, rather than saying ‘I jumped the lot.’ What's the point in that?"
To some people (particularly non-practitioners), parkour is an extreme sport, to others a discipline more comparable to martial arts. Some consider it a combination of the two, recognising similarities between parkour and the stunts and techniques of Hong Kong martial arts star Jackie Chan, whose fight and chase scenes take place in industrial or urban environments. Still others see it as an art form akin to dance: a way to encapsulate human movement in its most beautiful form. Parkour is often connected with the idea of freedom, in the form of the ability to overcome aspects of one's surroundings that tend to confine - for example, railings, staircases, or walls.
The practice of parkour requires considerable physical and mental dedication, and many adherents describe it as a "way of life." Parkour is art in motion.

Saut de Fond (soh'd foh)- Drop - literally 'jump to the ground / jump to the floor'. To jump down something.
Passement (passmoh) - Vault - The general word for all kinds of vaults.
Saut de Chat (soh cha) - Kong, Monkey - Literally 'jump of the cat / cat's jump' - to dive over an obstacle, and in the end of the obstacle push off with the hands to bring the body back in a vertical angle, ready to land.
Saut de D?tente (soh detoht) - Gap Jump - Saut de Bras (soh'd bra)
Catleap, Squirrel Leap - literally 'jump of the arm / arm jump'. To land at an obstacle in a hanging position, the arms hold the body.
Saut de Pr?cision (soh'd presision) - Catleap, Squirrel Leap - Precision Jump.
Saut Aveugle (soh Ahveul) - Blind Jump - To not see the landing area when you jump off the ground.
Passe Muraille (pas moorai) - Wallhop, Wallclimb, Wallpop, Popvault, Double tap - A general term for all kind of overcoming/scaling walls or similar obstacles.
Franchissement (froshismo) – Underbar - Jump through gap literally 'break through'. To jump/swing through the gap between obstacles. General term for all similar movements.
Lach? (lahshay) - Hanging Drop, Monkey Swing - 'Lach?r' literally means to let go. when you hang (on a bar, on a wall, on a branch) and let go (be it into a saut de fond, or from swinging and jump to the next obstacle or branch...).
Planche (plonsh - though the 'n' is very silent) - Muscle up, Catleap, Climb-Up - To get from a hanging position (wall, rail, branch, .. ) into a position where you 'stand on your arms' above the obstacle.
Tic Tac ( tic tuck ) - Tic-Tac - To kick off one obstacle to get the height to jump over another.
Saut (soh ) – Jump - To jump over an obstacle for example.
Roullade (ruhlad - the 'u' like in 'ruthless') roll forward, sideways, backward, whatever direction.
Demi Tour (deh-me tour) - Any kind of turnvault, literally 'half turn'.
Equilibre (eq-we-lee-bray) – Balance - Any form of balance, also includes handstands, hedstands, etc.
Source: worldwidejam.tv