roll·over 
/ˈroʊlˌoʊvɚ/ noun
plural roll·overs /ˈroʊlˌoʊvɚ/ noun [count, noncount] 1 a : the act of delaying the payment of a debt
b : the act of placing invested money in a new investment of the same kind — see also roll over at 1roll 2 chiefly US : an accident in which a car, truck, etc., turns over
▪ He was injured in a rollover (accident) on the highway. 3 chiefly Brit : prize money in a lottery that is not won and so is added to the prize money of the next lottery
b : the act of placing invested money in a new investment of the same kind — see also roll over at 1roll
▪ He was injured in a rollover (accident) on the highway.
