Definition of touch:
(v) :
to make physical
contact with; to bring the hand, finger or other part of the body into contact with; to come into (involuntary) contact with; to
meet or
intersect
"I touched her face softly."
(n) :
an act of touching, especially with the
hand or
finger; the faculty or sense of perception by physical contact
"suddenly, in the crowd, I felt a touch at my shoulder."