es la mayor

is the largest

→ ser
phrase Rare #35,688
is the largest Used with a feminine noun; depending on context, it can also mean “is the greatest.”
SP: Esta es la mayor ciudad del país.
EN: This is the largest city in the country.

Ese edificio es la mayor barrera para que el experimento no se salga de ahí.

That building is the biggest barrier preventing the experiment from getting out of its confines.

— El jardín de los pecadores 5: Paradoja espiral (2008)

Amar y ser amado es la mayor de las felicidades en esta vida.

To love and be loved is the greatest happiness in this life.

El petróleo es la mayor fuente de ingreso de Argelia.

Oil is Algeria’s largest source of income.

Se dice que Japón es la mayor potencia económica del mundo.

Japan is said to be the world's greatest economic power.

Ahmedabad es la mayor ciudad de Gujarat.

Ahmedabad is the largest city in Gujarat.

Mary es la mayor experta del país en el conflicto en Siria.

Mary is the country's leading expert on the conflict in Syria.

Es la mayor construcción de la ciudad.

It is the largest building in the city.

Fernando es la mayor prueba de ello.

Fernando is the greatest proof of that.

— El agente secreto (2025)

Ella es la mayor de las dos hermanas.

She is the older of the two sisters.