। ॥ ३० ॥
In plain words
Several words, each applying for a different reason, all landing on one and the same thing: that is sāmānādhikaraṇya, co-reference. This is exactly how those who frame definitions put it.
Close to the Sanskrit
When of words whose grounds of application are different there is application in one referent, co-reference (sāmānādhikaraṇya) occurs — so, in these very terms, the makers of definitions speak.