Trademark forfeiture refers to the legal process in which a registered trademark is cancelled or revoked due to the failure of the trademark owner to comply with certain legal requirements. This can occur if the trademark is not actively used in commerce, if it becomes generic or descriptive, or if the owner fails to renew the registration. In such cases, the trademark loses its legal protection and can be used freely by others without fear of infringement. Trademark forfeiture is a serious consequence for trademark owners and highlights the importance of actively maintaining and protecting their trademarks.