A narrow strip is a thin, elongated piece of material. The crossword solutions for this term are SLAT (4 letters), RUNNER (6 letters), STRIA (5 letters), and SWATH (5 letters). A SLAT is a thin, narrow strip of wood or metal used in a variety of applications such as blinds, shutters, and furniture. A RUNNER is a long, narrow strip of fabric or carpet that is used to cover a floor or table. A stria is a thin, narrow line or streak, often seen in rock formations. Finally, a SWATH is a broad strip of land or a wide area of something, such as a field or a body of water.