Source : Webster's Revised Unabridged Dictionary (1913)

Soncy \Son"cy\, Sonsy \Son"sy\, a. [Scot. sonce, sons,
   prosperity, happiness, fr. Gael. & Ir. sonas.]
   Lucky; fortunate; thriving; plump. [Prov. Eng. & Scot.]

Sonsy \Son"sy\, a.
   See {Soncy}. [Scot.] --Burns.

Source : WordNet®

sonsy
     adj : (of a woman's body) having a large bosom and pleasing
           curves; "Hollywood seems full of curvaceous blondes";
           "a curvy young woman in a tight dress" [syn: {bosomy},
           {busty}, {buxom}, {curvaceous}, {curvy}, {full-bosomed},
            {sonsie}, {voluptuous}, {well-endowed}]
     [also: {sonsiest}, {sonsier}]