Swiss \Swiss\, n.sing. & pl. [F. Suisse, of German origin. Cf. Switzer.]

A native or inhabitant of Switzerland; a Switzer; the people of Switzerland.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Swiss \Swiss\, a. Of or pertaining to Switzerland, or the people of Switzerland.

Source: Webster's Revised Unabridged Dictionary (1913)