Definition: A single piece of a given material, elongated and roughly round in cross-section, often twisted with other fibres to form thread.

Alright class, settle down now, let’s take a look today, At a word that’s important – let's brighten the way! We’re talking about “fibre,” you see, it’s quite a key, To understanding materials, for you and for me. The dictionary says it’s "a single piece, you know, Elongated and round, with a gentle flow." Think of it like strands, long and lean, A tiny building block, a vibrant scene! “Roughly round in cross-section,” that's part of the plea, Meaning it’s not perfectly smooth, wild and free. And often “twisted with other fibres,” you must embrace, To make strong threads together, setting a stylish pace! It’s like little strands, woven tight and true, Building fabrics beautiful, for me and for you! Does that make sense? Any questions to share? Don't be shy, let's show that we care!