| Term | Definition |
| block | head-shaped form, usually made of canvas-covered cork or styrofoam, to which the wig is secured for fitting, cleaning, coloing, and styling. |
| bonding | method of attaching hair extensions in which hair wefts or single strands are attached with an adhesive or a glue gun |
| cap wigs | wigs consisting of elasticized mesh-fiber bases to which the hair is attached |
| capless wigs | machine-made wigs in which rows of wefts are sewn to elastic strips in a circular pattern to fit the head shape |
| fallen hair | hair that has been shed from the head or gathered from a hairbrush, as opposed to hair that has been cut |
| fusion | method of attaching extensions in which extension hair is bonded to the client's own hair with a bonding material that is activated by heat from a special tool |
| hair extensions | hair additions that are secured to the base of the client's natural hair in order to add length, volume, texture or color |
| hairpiece | small wig used to cover the top or crown of the head; does not fully cover the head; toupee |
| hand-tied wigs | wigs made by inserting individual strands of hair into mesh foundations and knotting them with a needle |
| integration hairpiece | hairpiece with an opening in the base through which the client's own hair is pulled to blend with the hair (natural or synthetic) of the hairpiece |
| machine-made wigs | wigs made by machine by feeding wefts through a sewing machine, and then sewing them together to form the base and shape of the wigs |
| semi-hand-tied wigs | wigs constructed with a combination of synthetic hair and hand tied human hair |
| toupee | small wig used to cover the top or crown of the head |
| track and sew method | attachment method in which hair extensions are secured at the base of the client's own hair by sewing |
| turned hair | wig hair in which the root end of every hair strand is sewn into the base so that the cuticles of all hair strands slope in the same direction |
| wefts | strips of human or artificial hair woven by hand or machine onto a thread |
| wig | artificial covering for the head consisting of a network of interwoven hair |