A wig is a hairpiece made from human or synthetic hair that's worn by someone to cover their real hair.
You might hear about wigs being worn for fashion, like a celebrity sporting a new style at an awards show. Wigs are also commonly used as a way to conceal one's hair while it's growing out, recovering from damage, or during cancer treatment when hair falls out due to chemo.
A head of real or synthetic hair worn on the head to disguise baldness, for cultural or religious reasons, for fashion, or by actors to help them better resemble the character they are portraying.
To put on a wig; to provide with a wig (especially of an actor etc.).
