- In linguistics, a letter or symbol such as an alphabetic letter, a Chinese character, or a hieroglyph.
- In mathematics, the word
**graph**can have two meanings.- In graph theory, a
**graph**is an object consisting of vertices (or nodes) and edges (or*arcs*) between pairs of vertices. - The graph of a function
*f*:*X*->*Y*is the set of all pairs (*x*,*f*(*x*)) - The graph of a relation, a generalisation of the graph of a function.

- In graph theory, a