What is the meaning of Glissade?

A sliding, as down a snow slope in the Alps (Wikipedia).

A gliding step beginning and ending in a demi-plié in second position (Wikipedia).

A move in some dances such as the galop (Wikipedia).

A fencing move that may disarm the opponent (Wikipedia).

To perform a glissade.

slip, slide, skid

sideslip

Source: wiktionary.org