an American whose first language is Spanish
"The local Hispanic community gathered to celebrate their shared heritage and traditions."
A Spanish-speaking person.
"The teacher asked all the Hispanic students to share their favorite stories from Mexico."
In plain English: Hispanic is a person who comes from Spain or any country where Spanish is spoken as an official language.
"The judge asked hispanics in the courtroom to report for jury duty."
Of or relating to Spain
"The architecture in Seville is distinctly Hispanic, reflecting centuries of Spanish influence on the region's design and culture."
The word hispanic comes from the Latin hispānicus, which was formed by combining Hispānia (meaning Iberia) with the suffix -icus. It originally referred to something related to the Iberian Peninsula.