Definify.com
Webster 1913 Edition
Spa
Spa
(?; 277)
, Noun.
A spring or mineral water; – so called from a place of this name in Belgium.
Webster 1828 Edition
Spa
SPAW
, SPA, n.1.
A mineral water from a place of this name in Germany. The name may perhaps be applied to other similar waters.2.
A spring of mineral water.