Touch (?), v. i. 1. To be in contact; to be in a state of junction, so that no space is between; as, two spheres touch only at points. Johnson.
2. To fasten; to take effect; to make impression.
Strong waters pierce metals, and will touch upon gold, that will not touch upon silver. Bacon.
3. To treat anything in discourse, especially in a slight or casual manner; — often with on or upon.
If the antiquaries have touched upon it, they immediately
quitted it. Addison.
4. (Naut) To be brought, as a sail, so close to the wind that its weather leech shakes.
To touch and go(Naut.), to touch bottom lightly and without damage, as a vessel in motion. — To touch at, to come or go to, without tarrying; as, the ship touched at Lisbon. — To touch onorupon, to come or go to for a short time.
I made a little voyage round the lake, and touched on the several towns that lie on its coasts. Addison.