a netted winning opening of rectangular shape at the service side of the court. Cf. grille (def. 5), · the body of spectators behind this opening at a court-tennis match. Found on https://www.infoplease.com/dictionary/dedans
Literally: inwards. This term is used to indicate that a step is to be executed “inwards”. It can refer to the circular movement of a leg: from the back to the front. For example Found on https://www.learntodance.com/online-ballet-dance-lessons/