Greek Alphabet: Script used to write the Greek language

It is used to write the Greek language. Greek letters are also frequently used in science and mathematics to represent various values or variables. Most letters in the Greek alphabet have an equivalent in the English language.

Greek alphabet
Script type	Alphabet
Time period	c. 800 BC – present
Direction	left-to-right
Languages	Greek
Related scripts
Parent systems	Egyptian hieroglyphs Proto-Sinaitic alphabet Phoenician alphabet Greek alphabet
Child systems	Gothic Glagolitic Cyrillic Coptic Armenian Old Italic Latin Georgian
ISO 15924
ISO 15924	Grek (200), ​Greek
Unicode
Unicode alias	Greek
Unicode range	U+0370–U+03FF Greek and Coptic U+1F00–U+1FFF Greek Extended

The twenty-four letters (each in uppercase and lowercase forms) are:

Α α, Β β, Γ γ, Δ δ, Ε ε, Ζ ζ, Η η, Θ θ, Ι ι, Κ κ, Λ λ, Μ μ, Ν ν, Ξ ξ, Ο ο, Π π, Ρ ρ, Σ σ or ς, Τ τ, Υ υ, Φ φ, Χ χ, Ψ ψ, and Ω ω.

The Greek alphabet is thought to be where most European alphabets came from. The alphabet was borrowed from the Phoenician alphabet around the 10th century BC, with many changes to make it fit the Greek language.

Some of the Phoenician letters for sounds not used in Greek were turned into vowels. The Phoenicians wrote their abjad without any vowels, as with Hebrew and Arabic to the present day. Obviously, their peoples knew how to say the words, so that worked well for them. The Greek addition of vowels was better for countries where it might be a second language.

The Greek change made reading easier for trading with other cultures. In general, Indo-European languages did not use consonant-based roots (where the word's central meaning is based on the consonants) like those in Semitic languages such as Phoenician, Arabic, Hebrew, and Aramaic.

At first, Greek was written from right to left, same as Phoenician, but after the 6th century BC, it was written from left to right.

There were some differences in the early Greek alphabet in different parts of the Greek world. Over time, all Greeks started to use the same alphabet, especially after the Ionic alphabet of Miletus was officially adopted in Athens in 403 BC. A little later, the rest of Greece did the same, and by 350 BC, during the life of Alexander the Great, almost all Greeks were using the same twenty-four letter Greek alphabet.

Later, Aristophanes of Byzantium (c. 257–185 BC), a Greek scholar and grammarian, invented the three diacritics (accent marks): acute, grave, and circumflex, to mark the tone or pitch of Greek words.

Although the Greek letters accurately represented all the main sounds of the Greek language early on, the sounds of the Greek language changed over time. Some of the vowel sounds began to sound similar to one another, aspirated voiceless stops became voiceless fricatives, and voiced stops became voiced fricatives. One can get an idea of how older Greek pronunciations sounded, by looking at the Latin and English spellings of Greek loanwords like "philosopher", "Chimera", "Cyprus", and "Thessalonica".

Another diacritic is a comma, usually above initial vowels. This signaled whether or not the sound of the letter 'H' was present. It is not available in the English standard character-set. If this comma-like diacritic above the vowel is reversed, it indicates the presence of an /h/ sound before a vowel, diphthong, or rho. Thus, the Greek name Ἕκτωρ is pronounced Hektōr, not Ektor. Another example is ἥρως, pronounced hḗrōs ("hero").

In 1982, a new, simplified orthography, known as "monotonic", was adopted for official use in Modern Greek by the Greek state. It uses only a single accent mark, the acute accent. This marks the stressed syllable of polysyllabic words, that is, words with more than one syllable.

• Ancient Greek language
• Greek language
• History of the alphabet