To ensure a better experience on ACFE.com, we strongly recommend you upgrade your browser to one that supports current standards. We recommend Internet Explorer 9 or newer, Chrome or Safari. If you are using Internet Explorer 9 or newer, we recommend turning off compatibility mode.
Product of sequences. The product operator for the product of a sequence is denoted by the capital Greek letter Pi â (in analogy to the use of the capital Sigma â as summation symbol). The product of a sequence consisting of only one number is just that number itself.
symbol in British English. symbolnoun [ C ] A heart shape is the symbol of love. The wheel in the Indian flag is a symbol of peace. Water, a symbol of life, recurs as an image throughout her poems. âº a number, letter, or sign used in mathematics, music, science, etc.: The symbol for oxygen is O. âº An object can be described as a symbol of something else if it seems to represent it because it is connected with it in a lot of people's minds: