a set of letters used to write a language, esp when arranged in a conventional order
Our Roman alphabet derives from the one introduced into Greece in the 1st millennium BC, which was adapted from the Phoenician alphabet. Precursors of the earliest Phoenician inscriptions have been found in several Middle Eastern locations from c.1500 BC. But who first created the signs and ordered them, and why, and whether the invention happened more than once, is unknown — Professor David Crystal
a system of signs and signals that can be used in place of letters, e.g. a phonetic alphabet
a set of basic principles about a subject
learning the electronic alphabet
alphabetize verb
[Middle English alphabete via late Latin from Greek alphabētos, from alpha1 + bēta beta, the first two letters of the Greek alphabet]