Flannel/ˈflænl/ Definition 1 of 4Pro Tip 1/3Clothing Fabric Flannel as fabric is commonly used to make warm clothing. Flannel shirts are perfect for chilly autumn days. Pro Tip 2/3Seasonal Usage Flannel is a preferred material during cooler seasons for its warmth. She chose a flannel blanket to stay warm in winter. Pro Tip 3/3Texture Perception People often associate flannel with a soft and slightly fuzzy texture. The flannel sheets felt soft against his skin.