In Highland dance, a pas de basques is described as follows:

Prepare with an extension

Extension (kinesiology)

In kinesiology, extension is a movement of a joint that results in increased angle between two bones or body surfaces at a joint. Extension usually results in straightening of the bones or body surfaces involved. For example, extension is produced by extending the flexed elbow. Straightening of...

 of the working foot to second aerial position low. Spring to that side, bringing the new working foot into third or fifth position on the half point. Beat, without exaggeration, the ball of the other foot in third or fifth rear, sharply extending the front foot if required to begin the next movement.

In the Primary level, 16 of these are performed and it is considered a dance

Dance

Dance is an art form that generally refers to movement of the body, usually rhythmic and to music, used as a form of expression, social interaction or presented in a spiritual or performance setting....

, so this is one of the first movements a Highland dancer learns.