What is Latin America?

Legal Definition
Latin America is a group of countries and dependencies in the Americas where Romance languages are predominant. The term originated in 19th century France to consider French-speaking territories in the Americas (Haiti, French Guiana, Martinique, Guadeloupe, Saint Martin, Saint Barthélemy) along with the larger group of countries where Spanish and Portuguese languages prevailed. It is therefore broader than the terms Ibero-America or Hispanic America—though it usually excludes French Canada.

Latin America consists of nineteen sovereign states and several territories and dependencies which cover an area that stretches from the northern border of Mexico to the southern tip of South America, including the Caribbean. It has an area of approximately 19,197,000 km2 (7,412,000 sq mi), almost 13% of the Earth's land surface area. As of 2015, its population was estimated at more than 626 million and in 2014, Latin America had a combined nominal GDP of 5,573,397 million USD and a GDP PPP of 7,531,585 million USD. The term "Latin America" was first used in 1861 in La revue des races Latines, a magazine "dedicated to the cause of Pan-Latinism".
-- Wikipedia
Legal Definition
Western Hemisphere designated member countries/areas where mainly Spanish or Portuguese is spoken. These include Mexico, Central America except Belize, and South America except French Guyana, Guyana, and Suriname.