CONTACT

Definitions

1. 1. A close union or junction of bodies; a touching or meeting.
2. 2. The property of two curves, or surfaces, which meet, and at the point of meeting have a common direction.
3. 3. The plane between two adjacent bodies of dissimilar rock. Raymond. Contact level, a delicate level so pivoted as to tilt when two parts of a measuring apparatus come into contact with each other; -- used in precise determinations of lengths and in the accurate graduation of instruments.