1. [n]  an L-shaped metal bracket
2. [n]  either of two punctuation marks (< or >) used to enclose textual material

Either of the characters "" (greater-than, ASCII 62). Typographers in the Real World use angle brackets which are either taller and slimmer (the ISO "Bra" and "Ket" characters), or significantly smaller (single or double guillemets) than the less-than and greater-than signs.

See broket.