A transitional kitchen will have elements of contemporary and traditional design. A transitional kitchen is eclectic and combines manmade and natural materials, textures and finishes.
A mission style kitchen might be made transitional by adding bamboo flooring. A tuscan kitchen might be made transitional by using steel appliances or having some high tech lighting. You could have a cherry style kitchen with contrasting paint colours. The sky is the limit with transitional kitchens.
Transitional fixtures and mouldings are not elaborate but should have some degree of ornamentation.