1. A slender, elongated, threadlike object or structure. 2. One of the elongated, thick-walled cells that give strength and support to plant tissue. 3. Any of the filaments constituting the extracellular matrix of connective tissue. 4. Any of various elongated cells or threadlike structures, especially a muscle fiber or a nerve fiber. 5. A natural or synthetic filament, as of cotton or nylon, capable of being spun into yarn. 6. Material made of such filaments. 7. Something that provides substance or texture. 8. Oscar Wilde 9. lacking in moral fiber. 10. roughage
