Origin: Latin suffix -tion
Completion has 3 different meanings across 1 category:
(American football) a successful forward pass in football
"The quarterback celebrated his first completion of the season as the ball sailed through the end zone."
a concluding action
"The project manager approved the final report, marking the completion of their duties for the week."
The act or state of being or making something complete; conclusion, accomplishment.
"The completion of the marathon was celebrated by everyone who crossed the finish line."
In plain English: Completion is the state of having finished something completely.
"The completion of the project was celebrated with a party for everyone involved."
Usage: Use "completion" to describe the moment an action is fully finished or when a task reaches its final stage. It emphasizes the end point of a process rather than the ongoing effort involved in doing it.
The word comes from the Latin completio, which derives from the verb meaning "to fill up" or "complete." It entered English through French as a noun formed with the suffix -tion.