The set of letters used when writing in a language.
A 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.)
A typically finite set of distinguishable symbols.
An individual letter of an alphabet; an alphabetic character.
The simplest rudiments; elements.
To designate by the letters of the alphabet; to arrange alphabetically.