ثم إذا ترجح بعض وجوه المشترك بغالب الرأي يصير مؤولًا
When one of the interpretations of a homonym is preferred by prevailing judgment, the expression becomes muʾawwal.
Tarjīḥ (preference) means that evidence has made one eligible meaning stronger than the alternatives, although the residual possibility of error has not disappeared completely.
Before preference, the competing meanings remain unsettled. After preference, one becomes the preponderant intended sense.
Muʾawwal therefore does not name a new dictionary meaning; it describes a term whose intended meaning has been selected through interpretation.