A more thorough explanation:

Definition: A ballot box is a locked container where people put their completed ballots during an election.

Example: During the presidential election, voters went to their designated polling stations and cast their votes by filling out a ballot. They then placed their completed ballot into the ballot box.

Explanation: The example illustrates how a ballot box is used during an election. It is a secure container that ensures the privacy and accuracy of the voting process. Once a voter has completed their ballot, they place it into the ballot box, which is then sealed until it is time to count the votes. This ensures that the ballots are not tampered with or altered in any way.