B1
to put your hand on something
Dictionary examples:
She touched her phone screen and accidentally ordered 100 pizzas. (0.0)
He touched the old book and sneezed from a dust cloud. (0.0)
He touched the hot stove and danced like a startled flamingo. (0.0)
That paint is wet - don't touch it. (21.6)
He touched the girl on the arm to get her attention. (33.3)