Quote from American Heritage Dictionary:

"Process is the operation in the production of something. A series of actions to bring about an end or a result."

Description:

PROCESS intentionally performs changes of solidification or dissolution. It is a transformer of matter. It conceptualizes both involution and evolution, binding them in the coming-in and the going-out in time. It deals with the four elements: air, fire, water, earth. The serpent lion, flying overhead, holds in its claws the cycle of latent energy; the potential World Egg; the outer manifestation of Beingness.

Interpreted use:

You are the transformer and the transformation, and the four elements can be endlessly recombined by you.

Reversed (card received upside down):

Wrong combinations can lead to explosions.