The Constitution Act, 1982 is a key piece of legislation in Canada that patriated the country's constitution from the United Kingdom. It includes the Canadian Charter of Rights and Freedoms, which guarantees fundamental rights and freedoms to all Canadians, such as freedom of expression and the right to equality. This act also outlines the process for amending the constitution, allowing Canada to make changes without needing approval from the British Parliament. The Constitution Act, 1982 marked a significant step in Canada's journey towards full sovereignty and self-governance.