دَخَلَ رَجُلٌ، فَسَأَلَ الرَّجُلُ عَنِ الْمُدِيرِ.
A man entered, and the man asked about the director.
The first occurrence introduces an unidentified participant. The second uses the definite article to refer back to that participant: previous mention (ʿahd dhikrī). Definiteness here does not by itself signal honor or grandeur.
Similarly, جَاءَنِي رَجُلٌ عَظِيمٌ can convey that a distinguished man came, but one cannot assign magnification to every indefinite noun without supporting evidence. The discourse must establish whether the intended effect is magnificence, rarity, number, or simply first mention.