shift key

noun

1. a typewriter key that determines whether characters are printed in upper or lower case and controls the printing of numbers and symbols.
2. Computers. a key that performs the same functions as on a typewriter keyboard and also controls other functions, depending on the program:

   To print a file, depress the shift key and a function key.

shift key

noun

1. a key on a typewriter or computer keyboard used to type capital letters and certain numbers and symbols

Word History and Origins

Origin of shift key¹

First recorded in 1900–05