ability to do or act; capability of doing or accomplishing something. 2. political or national strength: the balance of power in Europe. 3. great or marked ability to do or act; strength; might; force. 4. the possession of control or command over others; authority; ascendancy: power over men's minds. 5. political ascendancy or control in the government of a country, state, etc.:
The United States shares land borders with Canada and Mexico and maritime (water) borders with Russia, Cuba, and the Bahamas in addition to Canada and Mexico.
North America. The landmass occupied by the present-day countries of Canada, the United States, and the Republic of Mexico make up North America. Greenland (Kalaallit Nunaat), an island landmass to the northeast of Canada, is also included in North America, for it has been attached to Canada for almost two billion years.