어떤 목적에 도움이 되거나 쓸모가 있는 성질이나 상태.
The quality or state of being useful or having a practical purpose.
예문:
"The usefulness of this new software tool became apparent during the project's final phase."
"Critics questioned the usefulness of the proposed law in preventing financial crimes."
"Regular maintenance can extend the usefulness of your household appliances for many years."