a mathematical object comprising a carrier set (aka underlying set or domain), an optional scalar set, a set of operations (typically binary operations, but otherwise each of finite arity) and a set of identities (axioms) which the operations must satisfy.
Any one of the numerous types of mathematical object studied in algebra and especially in universal algebra;
The process of computing the sum of a number with itself a specified number of times, or any other analogous binary operation that combines other mathematical objects.
The process of multiplying or increasing in number; increase.
A calculation involving multiplication.