(1):

(n.) Of or pertaining to number; consisting of number or numerals.

(2):

(n.) Expressing number; representing number; as, numeral letters or characters, as X or 10 for ten.

(3):

(n.) A figure or character used to express a number; as, the Arabic numerals, 1, 2, 3, etc.; the Roman numerals, I, V, X, L, etc.

(4):

(n.) A word expressing a number.