To work so that foaming occurs from too violent ebullition, which causes water to become mixed with, and be carried along with, the steam that is formed; said of a steam boiler
A prime number is a number which has no factors other than 1 (called non-trivial factors) Thus 13 is prime but 15=3*5 is not prime A number which is not prime is called composite A polynomial which has no factors other than 1 is called irreducible
A prime number is an integer larger than 1 whose only positive divisors are 1 and itself
You use prime to describe something that is most important in a situation. Political stability, meanwhile, will be a prime concern It could be a prime target for guerrilla attack The police will see me as the prime suspect!