In extended uses. transitive. To treat with a substance for some (usually beneficial) purpose. Also figurative. Obsolete.

To deal with in order to effect some particular result. To subject to chemical or other physical action; to act upon with some agent.

transitive. To reproduce (a drawing, etc.) by a mechanical or photographic printing process (cf. process, n. compounds 3). Obsolete.

Originally U.S. transitive. To deal with (something) according to an established procedure; to process.