A letter may refer to any of the following:
1. A letter is any character that is not considered a number or symbol. For example, a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, and z are all lowercase letters in the English language and letter keys on the keyboard. In the image to the right is an example of the uppercase letter 'A'.