This is the 188th most frequent Hebrew word.
הגדול
The great.
In this sentence, 'הגדול' means 'the large' and is used as an adjective describing the house (בית).
הבית הגדול נמצא ברחוב הראשי.
The large house is located on the main street.
Here, 'הגדול' translates to 'the older' and refers to the comparative age among siblings, indicating a familial hierarchy.
הוא האח הגדול שלי ותמיד דואג לי.
He is my older brother and always takes care of me.
In this context, 'הגדול' means 'the great' and conveys a qualitative admiration towards the teacher.