Usage Note
Completado is the past participle of completar used as an adjective, meaning that a task, process, or form has been finished or filled in. It is common in administrative and digital contexts (formulario completado — completed form). In everyday speech, terminado (finished) and hecho (done) are often preferred; completado has a more procedural feel.
Examples
"El proyecto ha sido completado dentro del plazo."
Natural Translation
The project has been completed within the deadline.

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