How to Say "domain" in Spanish
The most common Spanish word for “domain” is “área” — use 'área' when referring to a department or scope of responsibility within an organization or a specific field of work..
área
Examples
Ella trabaja en el área de recursos humanos.
She works in the Human Resources department/area.
campo
/kahm-poh//ˈkampo/

Examples
La Dra. Ramírez es una experta en el campo de la genética.
Dr. Ramírez is an expert in the field of genetics.
Este es un campo de estudio muy competitivo.
This is a very competitive field of study.
Hay muchas oportunidades en el campo de la tecnología.
There are many opportunities in the technology field.
dominio
doh-MEE-nyoh/doˈmi.njo/

Examples
El dominio de nuestra página web es www.inklingo.com.
The domain of our website is www.inklingo.com.
Esta investigación está fuera de mi dominio de experiencia.
This research is outside my domain (sphere) of expertise.
universo
oo-nee-VER-so/u.niˈβeɾ.so/

Examples
Para él, el fútbol es todo su universo.
For him, football is his whole world (or universe).
Introducirse en el universo de la programación fue fascinante.
Getting introduced to the world (or domain) of programming was fascinating.
Su universo musical es muy diferente al mío.
Her musical universe (style/scope) is very different from mine.
Using Possessives
In this figurative sense, 'universo' is often paired with possessive words (mi, tu, su) or the preposition 'de' (of) to define whose world or sphere you are talking about.
terreno
teh-RREH-noh/teˈreno/

Examples
No entremos en ese terreno; hablemos solo de negocios.
Let's not enter that area (of discussion); let's only talk about business.
La física cuántica es un terreno muy complejo para los principiantes.
Quantum physics is a very complex field for beginners.
Metaphorical Use
Think of this meaning as using the idea of 'land' to describe a mental or intellectual space.
territorio
/teh-ree-TOH-ryoh//te.riˈto.rjo/

Examples
La ciencia de datos es un territorio nuevo para muchos economistas.
Data science is a new domain (or territory) for many economists.
No puedo ayudarte con eso; está fuera de mi territorio.
I can't help you with that; it's outside my area of expertise (or my turf).
Este proyecto es mi territorio exclusivo, por favor no interfieras.
This project is my exclusive domain, please don't interfere.
Using 'de'
When using 'territorio' in the figurative sense, you often link it to the area of expertise using the word 'de' (of): 'territorio de la ley' (the domain of law).
Confusing General Knowledge Areas
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