overtype

Noun

 * 1)  A feature in wordprocessing whereby each typed character replaces the character after the cursor rather than being inserted before it.
 * 2)  A kind of steam wagon having the engine above the cab.
 * 1)  A kind of steam wagon having the engine above the cab.

Verb

 * 1) To type on top of something already typed.
 * You can produce the yen sign ¥ by overtyping an equals sign = on a letter Y.