Digraph, often misspelled as diagraph, may refer to:

• Digraph (orthography), a pair of characters used together to represent a single sound, such as "ch" in English

• Ligature (writing), the joining of two letters as a single glyph, such as "æ"

• Digraph (computing), a group of two characters in computer source code to be treated as a single character

• A directed graph, in graph theory

• Digraph, a component of a CIA cryptonym, a covert code name

• Digraph, a two-letter ISO 639-1 language code

See also

• Digraphia, use of multiple complete writing systems for one language.

• Digram (disambiguation) / Digramme

• Bigram

• Trigraph (disambiguation)

• Multigraph (disambiguation)

• Unigraph

• wikt:Diagraph, a combination of a protractor and a scale ruler