Definition of overtype in US English:

overtype

verb

[with object]
  • Type over (another character)

    ‘overtype it with the correct number and press Return’
    • ‘This meant that whenever I wanted to hit the ‘Delete’ key, I ended up pressing ‘Insert’ instead, and overtyping a bunch of text.’
    • ‘Overtyping the text (select all and type) wraps the content in p tags.’

Pronunciation

overtype

/ˌōvərˈtīp/