The sign for group is done by using curved-5-hands (or "loose claw
hands"). Hold your hands up -- palms facing slightly forward. Move
your hands forward as you twist the palms slightly backward. The
movement should look as if you are sliding your hands around a ball.
Note: I sometimes refer to the above sign as the "CLUSTER" sign, but
that is just me. It could also be labeled as "CATEGORY."
If for some reason you need to specifically indicate the English word "group"
you can do so by initializing this sign with a "G."
GROUP (initialized "G" version)
Also see: CLASS
You can learn
American Sign Language (ASL) online at American Sign Language University ™
ASL resources by Lifeprint.com © Dr. William Vicars