The Open Dictionary

caps lock (key)

noun

UK/ˈkæps lɒk ˌkiː/
US/ˈkæps lɑːk ˌkiː/

Definitions of caps lock (key) noun

  1. CountableUncountable

    A key on a computer keyboard that, when pressed, causes all subsequently typed letters to appear in uppercase until pressed again.

    • I accidentally hit the caps lock key, so my password was all in uppercase.

    • Please make sure your caps lock key is off, or else your text might look odd.

    • His habit of always having the caps lock key on really bothers me.