the letters of a language in their customary order.
any system of characters or signs with which a language is written:
the Greek alphabet.
any such system for representing the sounds of a language:
the phonetic alphabet.
first elements; basic facts; simplest rudiments:
the alphabet of genetics.
the alphabet, a system of writing, developed in the ancient Near East and transmitted from the northwest Semites to the Greeks, in which each symbol ideally represents one sound unit in the spoken language, and from which most alphabetical scripts are derived.
Writing systems mongolian has been written in a variety of alphabets over the centuries.
British Dictionary definitions for alphabets
a set of letters or other signs used in a writing system, usually arranged in a fixed order, each letter or sign being used to represent one or sometimes more than one phoneme in the language being transcribed
any set of symbols or characters, esp one representing sounds of speech
basic principles or rudiments, as of a subject
C15: from Late Latin alphabētum, from Greek alphabētos, from the first two letters of the Greek alphabet; see alpha, beta
1560s (implied in alphabetical), from L.L. alphabetum (Tertullian), from Gk. alphabetos, from alpha + beta, the first two letters of it, from Heb.-Phoen. aleph, pausal form of eleph "ox" + beth, lit. "house;" the letters so called because their shapes resembled or represented those objects. The Greeks added -a to the end of many Heb.-Phoenician letter names because Gk. words cannot end in most consonants. Alphabet soup first attested 1907.