Then the discussion here is a reference... to what is now called expression And its meaning here is not what contains... a useful meaning like "be upright" in grammar
ثمَّ الكلامُ هَاهُنا إشَارَةْ ... لِمَا يُسَمَّى الآنَ بالعِبَارَة وَليْسَ مَعْناهُ هُنا مَا يَحْوِي ... مَعْنىً مُفِيدًا كاسْتقِمْ فِي النحْو