03-Definitions

Fibre: - 

It is defined as one of the delicate, hair portions of the tissues of a plant or animal or other substances that are very small in diameter in relation to their length. A fiber is a material which is several hundred times as long as its thickness.

Textile Fibre: - The essential requirements for Textile fibers to be spun into yarn include a length of at least 5 millimeters, flexibility, cohesiveness, and sufficient strength. Other important properties include elasticity, fineness, uniformity, durability, and luster will make a fiber into textile fiber

Yarn: - 

Yarn is a long continuous length of twisted or interlocked fibers, suitable for use in the production of textiles, sewing, crocheting, knitting, weaving, embroidery, and rope making. Thread is a type of yarn intended for sewing by hand or machine. Sewing threads may be finished with wax or other lubricants to withstand the stresses involved in sewing. Embroidery threads are yarns specifically designed for hand or machine embroidery.

Fabric: - 

Fabric or cloth is a flexible two dimensional material that is made by a network of natural or artificial fibers. The formation of fabric maybe interlacing (Weaving), interloping (Knitting), or inter meshing (as in knotting, punching etc.)

Garment: - 

Garment is a three dimensional form made with fabrics, sewing is the major method used to construct the garments

Apparel is any clothing material made using any textile fabric/ material. Hence all garments are apparels but all apparels are not garments (e.g. CAPS, shoes etc. are apparels, shirts, trousers, etc. are garments)