Definition of roll:
to cause to revolve by turning over and over; to move by turning on an axis; to impel forward by causing to turn over and over on a supporting surface; to wrap round on itself; to form into a spherical or cylindrical body by causing to turn over and over
"roll a wheel, a ball, or a barrel"
the act of rolling, or state of being rolled; that which rolls; a roller
"the roll of a ball"