The United States exports more than a trillion dollars of merchandise to Mexico and Canada every year.Estados Unidos exporta más de un billón de dólares de mercancía a México y Canadá cada año.
A noun is a word referring to a person, animal, place, thing, feeling, or idea (e.g., man, dog, house).
(m) means that a noun is masculine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).