1. Situated farthest from point of attachment or origin, as of a limb or bone.(wordnetweb.princeton.edu)
2. Directed away from the midline or mesial plane of the body. (wordnetweb.princeton.edu)
3. Used for the point furthest from the point of attachment to the body. (wikipedia.org)
4. Remote from the point of attachment or origin; as, the distal end of a bone or muscle. (wiktionary.org)
Word origin: Latin distare; to stand away from.