👉 In mathematics, a homograph is a binary relation that can be represented by two strings of letters. The terms "homograph" and "homography" are often used interchangeably in this context. A homograph is a binary relation that can be represented by two strings of letters (e.g., "a", "b") or other sequences of letters (e.g., "ab"). In this representation, the first string is called the "source" part and the second string is called the