ETYM Latin portabilis, from portare to carry: cf. French portable. Related to Port demeanor.
1. Easily or conveniently transported.
2. Of a motor designed to be attached to the outside of a boat's hull.

1. Capable of running on more than one computer system or under more than one operating system. Highly portable software can be moved to other systems with little effort, moderately portable software can be moved only with substantial effort, and nonportable software can be moved only with effort similar to or greater than the effort of writing the original program.
2. Light enough, rugged enough, and free enough of encumbering external connections to be carried by a user.

Something that is portable
A small light typewriter.