The phrase "sparse areas" refers to places or regions that have few or rare occurrences of something, such as houses, trees, or people. Full definition
Our special powder matte formulation fills in sparse areas & blends well to give you the ultimate definition with a natural finish. (notonlymakeup.net)
I had been wanting a product to help fill in sparse areas of my brows, but I didn't need anything to dramatic. (ladyinviolet.com)
Second, individual changes have occurred at some key locations in remote, data - sparse areas with large «footprints» in the national average. (bom.gov.au)