[1] : The Collaborative International Dictionary of English v.0.48

touch \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.
      1913 webster

   2. to fasten; to take effect; to make impression. r.
      1913 webster

            strong waters pierce metals, and will touch upon
            gold, that will not touch upon silver. --bacon.
      1913 webster

   3. to treat anything in discourse, especially in a slight or
      casual manner; -- often with on or upon.
      1913 webster

            if the antiquaries have touched upon it, they
            immediately
            quitted it.                           --addison.
      1913 webster

   4. naut to be brought, as a sail, so close to the wind that
      its weather leech shakes.
      1913 webster

   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 on or to touch upon,
      a to come or go to for a short time. r.
          1913 webster

                i made a little voyage round the lake, and
                touched on the several towns that lie on its
                coasts.                           --addison.
          1913 webster
      b to discuss briefly, as only a small part of a
          discourse.
          pjc
see also:
to touch and go to touch at to touch on to touch upon 

Touch >> T Words
Touch, definition of term: Touch
touch_pag1.html

Touch Screen >> T Words
Touch Screen, definition of term: Touch Screen
touch+screen_pag1.html

Touch System >> T Words
Touch System, definition of term: Touch System
touch+system_pag1.html

Touch Off >> T Words
Touch Off, definition of term: Touch Off
touch+off_pag1.html

Touch Up >> T Words
Touch Up, definition of term: Touch Up
touch+up_pag1.html

Touch Base >> T Words
Touch Base, definition of term: Touch Base
touch+base_pag1.html

Touch Down >> T Words
Touch Down, definition of term: Touch Down
touch+down_pag1.html

In Touch >> I Words
In Touch, definition of term: In Touch
in+touch_pag1.html

Touch And Go >> T Words
Touch And Go, definition of term: Touch And Go
touch+and+go_pag1.html

Get In Touch >> G Words
Get In Touch, definition of term: Get In Touch
get+in+touch_pag1.html