1. Fabrics that have been stacked in multiple layers and bonded with a stitching yarn or by other means. The preform may be cut into a shape for subsequent moulding into a composite part.

2. A preshaped nonwoven made by distributing fibres over a screen in the approximate contour of the finished part.

3. A preshaped, three-dimensional reinforcement made via braiding, weaving, or knitting or some combination of these.

4. A formed but not fully consolidated stack of prepreg layers which have the contour of the finished product. 5. The first stage in the production of blow-molded products such as pet bottles.