1. (of a woman's body) having a large bosom and pleasing curves
   "Hollywood seems full of sonsie blondes";
   - bosomy, busty [informal], buxom, curvaceous, curvy, full-bosomed, sonsy [UK, dialect], stacked [slang], voluptuous, well-endowed [informal], well-stacked [slang], Rubenesque
    
2. Lucky, cheerful, or pleasant
   "She had a sonsie smile that lit up the room"

See also: shapely