noun
1.
a set of characters in which a language can be written
the Greek alphabet
Synonyms: ABC(s), christcross-row, letters
2.
the simplest fundamental part or level
learning the alphabet of computer science
Synonyms: ABC's, elements, fundamentals, grammar, principles, rudiments
Related Word: beginning, commencement, start; outset
Idioms: first steps
Contrasted words: entirety, total, whole; details, minutiae, trivia