envelopment

French enveloppement

envelopment (countable and uncountable, plural envelopments)

1. The act of enveloping.
2. That which envelops; a covering.
3. (military) An offensive action in which an attacking force moves over or around the enemy and attacks from the rear; see also pincer movement.
4. (fencing) An action to seize the opponent's blade in one line and lead it (without losing contact) through a full circle to end in the same line.

• double envelopment