(organic chemistry) Any chemical entity that is temporarily reacted with a functional group so as to protect it from a subsequent reaction

The tert-butyloxycarbonyl protecting group or tert-butoxycarbonyl protecting group (BOC group) is an acid-labile protecting group used in organic synthesis.

The Richard L. Trumka Protecting the Right to Organize Act, or PRO Act, is a proposed United States law that would amend previous labor laws such as the National Labor Relations Act for the purpose of expanding "various labor protections related to employees' rights to organize and collectively bargain in the workplace.”

A protecting power is a country that represents another sovereign state- the protected power- in a third country where the protected power lacks its own formal diplomatic representation (e.g., lacks an embassy or consulate).