n. The theorem that establishes the rule for forming the terms of the nth power of a sum of numbers in terms of products of powers of those numbers.
multinomial theorem
multinomial theorem
[‚məl·tə¦nō·mē·əl ′thir·əm] (mathematics) The rule for expanding (x1+ x2+ ⋯ + xm)n, where m and n are positive integers; a generalization of the binomial theorem.