EXPRESS: The American Sign Language (ASL) sign for "express"
 

One option for how to convey the concept of EXPRESS is to sign:

The hands begin in the "S" handshape against the body and then open up as they move outward away from the body.
 

Another option is the one and two handed versions for EXPRESS which can also be used to mean POEM or POETRY:

Notes: 

Also see: SHARE

FAST

INFORM

CAUSE