1. overtype - Noun
2. overtype - Verb
(computing, uncountable) A feature in wordprocessing whereby each typed character replaces the character after the cursor rather than being inserted before it.
Synonyms: overstrike, typeover
(historical, countable) A kind of steam wagon having the engine above the cab.
Coordinate term: undertype
overtype (third-person singular simple present overtypes, present participle overtyping, simple past and past participle overtyped)
To type on top of something already typed.
You can produce the yen sign ¥ by overtyping an equals sign = on a letter Y.