What does reposado mean?

Reposado means “rested” in Spanish, and it refers to the amount of time the tequila has been aged in oak barrels. PATRÓN Reposado, made from 100% Weber Blue Agave, is carefully distilled and then aged for at least 4 months in American Bourbon barrels to create our ultra-premium reposado tequila.

What does reposado mean?