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Related to shift key: alt key
1. A key on a typewriter that, when depressed, allows uppercase letters and certain symbols to be typed.
2. A key on a computer keyboard that, when depressed, allows uppercase letters and certain special characters to be typed or changes the function of another concurrently depressed key or button.
(Printing, Lithography & Bookbinding) a key on a typewriter or computer keyboard used to type capital letters and certain numbers and symbols
a key on a typewriter or computer that is pressed to enter capital letters and other symbols and on a computer, to control certain other functions.