vs
QUICK ANSWER
"Concluir" is a transitive verb which is often translated as "to conclude", and "ultimar" is a transitive verb which is often translated as "to finalize". Learn more about the difference between "concluir" and "ultimar" below.
concluir(
kohng
-
klweer
)A transitive verb is a verb that requires a direct object (e.g., I bought a book.).
b. to finish
El arquitecto espera concluir las obras de remodelación en un mes.The architect expects to finish remodeling in about a month.
c. to complete
Los fondos se nos agotaron antes de que concluyéramos la expedición.We ran out of funds before we completed the expedition.
2. (to infer)
a. to conclude
Concluyeron que su propuesta era la más adecuada para este proyecto.They concluded that her proposal was the most appropriate for this project.
b. to come to the conclusion
Por lo que me has dicho, concluyo que no quieres participar en el negocio.Based on what you have told me, I have come to the conclusion that you don't want to take part in the business.
An intransitive verb is one that does not require a direct object (e.g., The man sneezed.).
a. to conclude
Llegas demasiado tarde; el evento ya ha concluido.You've come too late; the event has already concluded.
b. to finish
Tomaré un descanso en cuanto el trabajo haya concluido.I will take a break as soon as the work is finished.
c. to end
La conferencia está programada para concluir mañana.The conference is scheduled to end tomorrow.
d. to expire (deadline, period)
El período de prueba gratuito del software ha concluido.The free trial period for this software has expired.
concluirse
A pronominal verb always uses a reflexive pronoun. (e.g., Te ves cansado.).
4. (to finish)
ultimar(
ool
-
tee
-
mahr
)A transitive verb is a verb that requires a direct object (e.g., I bought a book.).
a. to finalize
Los arquitectos están ultimando los detalles del proyecto de refacción.The architects are finalizing the details for the refurbishment project.
b. to finalise (United Kingdom)
Regionalism used in the United Kingdom
Solo queda un mes para ultimar los preparativos del congreso que este año se celebrará en Lima.There's only a month left to finalise the preparations for the conference which this year will be held in Lima.
c. to complete
Ya ultimamos los preparativos para el desfile.We've completed the arrangements for the parade.
d. to put the final touches to
Los actores están ultimando los detalles para la función de esta noche.The actors are putting the final touches to tonight's performance.
e. to put the finishing touches to
La compositora alemana está ultimando su nuevo disco.The German composer is putting the finishing touches to her new album.
2. (to slay) (Latin America)
Regionalism used in Latin America: all the countries in South America, Central America, and the Caribbean. Does not include Spain.