Mathematics A member of the set of positive integers; one of a series of symbols of unique meaning in a fixed order that can be derived by counting. Mathematics A member of any of the further sets of mathematical objects, such as negative integers and real numbers. Arithmetic. A symbol or word used to represent a number. A numeral or a series of numerals used for reference or identification: his telephone number; the apartment number. A position in an ordered sequence that corresponds to one of the positive integers: the house that is number three from the corner; ranked number six in her class. One item in a group or series considered to be in numerical order: an old number of a magazine. A total; a sum: the number of feet in a mile. An indefinite quantity of units or individuals: The crowd was small in number. A number of people complained. A large quantity; a multitude: Numbers of people visited the fair. Numerical superiority: The South had leaders, the North numbers. Grammar The indication, as by inflection, of the singularity, duality, or plurality of a linguistic form. Metrical feet or lines; verses: "These numbers will I tear, and write in prose\u201d ( Shakespeare). Obsolete Poetic meter. Archaic Musical periods or measures. Games A numbers game. See Table at Bible. One of the separate offerings in a program of music or other entertainment: The band's second number was a march. Slang A frequently repeated, characteristic speech, argument, or performance: suspects doing their usual number\u2014protesting innocence. Slang A person or thing singled out for a particular characteristic: a crafty number. To assign a number to. To determine the number or amount of; count. To total in number or amount; add up to. To include in a group or category: He was numbered among the lost. To mention one by one; enumerate.