sill - (geology) a flat (usually horizontal) mass of igneous rock between two layers of older sedimentary rock. geology - a science that deals with the history of the earth as recorded in rocks. rock, stone - a lump or mass of hard consolidated mineral matter; he threw a rock at me. Translations.
Outfit #2- With jeans. Now it is perfectly fine to wear a tunic with a pair of skinny jeans. However, it is important to point out that if you have wide hips and thighs the size of them may be overemphasized if you wear a tunic with them, especially if that tunic ends at the widest part of your hips.
1 While youâre out sightseeing, wear your favorite lightweight tunic over a pair of bermuda shorts or capris. Complete your look with a pair of comfortable shoes, a few pieces of simple jewelry, and a light jacket.  For an evening dinner, throw on a fancy tunic over a pair of slim cropped pants.