prop. a. 1. Of, pertaining to, or characteristic of the style of William S. Gilbert; as, Gilbertian libretti. [ WordNet 1.5 ]
2. Wildly comic and improbable, as in Gilbert and Sullivan operas; as, Gilbertian coincidences. [ WordNet 1.5 ]
a Gilbertian world people with foundlings and changelings. T. C. Worsley [ WordNet 1.5 ]