shift lock

English

Noun

shift lock (plural shift locks)

1. (typewriting) A lock key on a typewriter, which, when pressed, causes all subsequently typed letters to be capitalized.
   • 2006, Tsitsi Dangarembga, The Book of Not, Faber & Faber Limited (2021), page 264:

     Belinda released the shift lock and reverted to lower case.