A more thorough explanation:

Definition: Eundo et redeundo is a Latin phrase that means "going and returning." It was commonly used to describe vessels in transit.

Example: The ship sailed from the port of New York to London and back to New York. This voyage is an example of eundo et redeundo.

Explanation: The example illustrates the definition of eundo et redeundo because it shows a vessel (the ship) going from one place (New York) to another (London) and then returning to the original place (New York). The phrase is used to describe the round trip journey of the ship.