n. The letters of a language arranged in the customary order; the series of letters or characters which form the elements of written language. See the articles on the different letters, A, B, C, etc.n. Any series of characters intended to be used in writing instead of the usual letters, as the series of dashes, dots, etc., used in the transmission of telegraphic messages.n. First elements; simplest rudiments: as, not to know the alphabet of a science.To arrange in the order of an alphabet; mark by the letters of the alphabet.