أَكْثَرُ may also be used as mudaf to express a majority:
أَكْثَرُ النَّاسِ — most people.
In this presented meaning, مُعْظَمُ can also be used:
مُعْظَمُ الطُّلَّابِ — most students.
This is a contextual equivalence for “most,” not a claim that the two words are interchangeable in every sentence.
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كُلٌّ، بَعْضٌ، أَكْثَرُ، غَيْرُ in Idafah
أَكْثَرُ may also be used as mudaf to express a majority:
أَكْثَرُ النَّاسِ — most people.
In this presented meaning, مُعْظَمُ can also be used:
مُعْظَمُ الطُّلَّابِ — most students.
This is a contextual equivalence for “most,” not a claim that the two words are interchangeable in every sentence.