What is "line feed"

n. 1 On a typewriter, the action of the carriage roller to push the page up one, two or one and a half lines (as set elsewhere) when executing a carriage return. 2 (context computing English) The character (0x0a in ASCII) which advances the paper by one line in a teletype or printer, or moves the cursor to the next line on a display. vb. To advance the page one line at a time, particularly in rapid succession.

n. the operation that prepares for the next character to be printed or displayed on the next line