Lacking in education, taste, or refinement. His uncultured behavior at the dinner party was quite embarrassing.
Not having been cultivated or developed, especially in reference to land or soil. The uncultured land was overgrown with wild plants and weeds.
Not grown or propagated in an artificial or laboratory culture, especially of microorganisms, cells, or pearls. Scientists are studying many uncultured bacteria found in deep-sea vents.