Definitions
1.nounThe set of letters used when writing in a language."In the first year of school, pupils are taught to recite the alphabet."
2.nounA writing system in which letters represent phonemes. (Contrast e.g. logography, a writing system in which each character represents a word, and syllabary, in which each character represents a syllable.)
3.nounA typically finite set of distinguishable symbols."Let L be a regular language over the alphabet \Sigma."
4.nounAn individual letter of an alphabet; an alphabetic character.
5.nounThe simplest rudiments; elements.
6.verbTo designate by the letters of the alphabet; to arrange alphabetically.