What Does It Mean?

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From our dictionary:
glis•sade

(gli•säd', -sAd'),
n., v., -sad•ed, -sad•ing.

n.
1. a skillful glide over snow or ice in descending a mountain, as on skis or a toboggan.
2. Dance.a sliding or gliding step.

v.i.
to perform a glissade.