There is a problem with this example sentence.
The example sentence is about the word "rocker", but the dictionary word that it is attached to is translated as "locker" so either this sentence is not suitable as an example for "locker" or the definition should translate the word ロッカー to both "(1) locker" and "(2) rocker" and then this sentence would be an example for definition number 2.
Thanks for pointing this out. WWWJDIC will be updated in a day or so, the indexing will be fixed in a week when it updates.