Digraph may refer to: Digraph (orthography), a pair of characters used to write one phoneme (distinct sound) or a sequence of phonemes that doesn't correspond to the normal values of the two characters combined Typographical ligature, the joining of two letters as a single glyph (for example æ) Digraph (computing), a two-character sequence used to enter a single conceptual character Digraph (mathematics), a synonym for "directed graph"… (More on Digraph)