Completion, n.
Etymology: [L. completio a filling, a fulfillment.]
1. The act or process of making complete; the getting through to the end; as, the completion of an undertaking, an education, a service. The completion of some repairs. Prescott.
2. State of being complete; fulfillment; accomplishment; realization. Predictions receiving their completion in Christ. South.
Shades of meaning
Fernald has no entry of its own for completion; he lists it under end.
He lists it without comment; the entries above explain its neighbors.