A number or numeral, (Math.) Any number, proper or improper fraction, or incommensurable ratio. The term also includes any imaginary expression like m + n?-1, where m and n are real numerics, adjective_ Belonging to number; denoting number; consisting in numbers; expressed by numbers, and not letters, elating to or having ability to think in or work with numbers. Contrasted with verbal, measured or expressed in numbers