Would like to have alt key mapped to Windows key

[sellputcall]

emacs: GNU Emacs 25.3.1 (x86_64-redhat-linux-gnu, GTK+ Version 3.22.19) of 
2017-09-14

OS: Fedora 25


My keyboard's alt key seems to have conked out. Both of them.
So alt keys in emacs are missing which is a real pain. I dont want to rely on 
the Esc key all the time.


Is there a way to map the windows key, which emacs seems to call "s-" to the 
alt key. This would be very convenient to have until i replace my laptop 
keyboard.


So eg: "s-w" would map to "m-w".
Right now i see that the s-w combination is undefined.


Can i do this via a set-key command or would i have to create a new keymap ?

tia,

Sunil