خَيْرُ

A word in the Arabic language will either be 1) a verb or 2) a noun or 3) a particle – خَيْرُ is a noun

A noun may either be 1) Definite or indefinite 2) Masculine or feminine 3) Singular, dual or plural 4) Nominative, accusative or genitive

الخَيْرُ is the natural state of a definite noun and it is in this state ( مَرْفُوْعٌ) when the noun is: 1) the subject المُبْتَدَأُ or 2) the predicate الخَبَرُ or 3) اسْمُ كَانَ or 4) خَبَرُ إِنَّ or 5) الفَاعِلُ subject of a verb in the active voice or 6) نَائِبُ الفَاعِلِ subject of a verb in the passive voice or 7) it’s a noun of dependent declension a) نَعْتٌ / صِفَطٌ adjectives b) التَّوْكِيْدُ emphatic c) المَعْطُوْفٌ conjunction d) البَدَلُ synonym

الخَيْرُ loses it’s definite article, changing to خَيْرُ due to it being a possessed noun

Excellent, Best, Better, Good, Wealth

To be good, excellent

Surah/Below are the 20 verses in the holy Quran containing the nominative, possessed nounخَيْرُ
Verse
3-54and they plotted and Allah (SWT) planned, and Allah (SWT) is the best of those who planوَمَكَرُوا وَمَكَرَ اللهُ وَاللهُ خَيْرُ المَاكِرِيْنَ
3-150Nay, Allah (SWT) is your protector, and He is the best of helpersبَلِ اللهُ مَوْلَاكُمْ وَهُوَ خَيْرُ النَّصِرِيْنَ
Isa, son of Maryam said, “O Allah (SWT), our Lord! send to us from the heaven a table spreadقَالَ عِيْسَى ابْنُ مَرْيَمَ اللَّهُمَّ رَبَّنَآ أَنْزِلْ عَلَيْنَا مَآئِدَةً مِنَ السَّمَآءِ
that there may be for us, for the first and the last of us a festival and a sign from Youتَكُونُ لَنَا عِيْدًا لِأَوَّلِنَا وَءَاخِرِنَا وَءَايَةً مِنْكَ
5-114and provide us as You are the best of providers”وَارْزُقْنَا وَأَنْتَ خَيْرُ الرَّازِقِيْنَ
say, “truly I am on clear proof from my Lord, while you deny it” not with me what you seek to hasten of itقُلْ إِنِّي عَلَى بَيِّنَةٍ مِّنْ رَّبِّي وَكَذَّبْتُمْ بِهِ مَا عِنْدِي مَا تَسْتَعْجِلُوْنَ بِهِ
6-57not is the decision except for Allah (SWT), He relates the truth and He is the best of Deciders (Judges)إِنِ الحُكْمُ إِلَّا لِلَّهِ يَقُصُّ الحَقَّ وَهُوَ خَيْرُ الفَاصِلِيْنَ
and if was a group among you (who) believed in that which I was sent with it, and a groupوَإِنْ كَانَ طَآئِفَةٌ مِّنْكُمْ ءَامَنُوا بِالَّذِي أُرْسِلْتُ بِهِ وَطَآئِفَةٌ
7-87who didn’t believe then be patient till Allah (SWT) judges between us and He is the best of the judgesلَّمْ يُؤْمِنُوا فَاصْبِرُوا حَتَّى يَحْكُمَ اللهُ بَيْنَنَا وَهُوَ خَيْرُ الحَاكِمِيْنَ
Indeed, we would invent against Allah (SWT) a lie if we returned in your religion after Allah (SWT) saved usقَدِ افْتَرَيْنَا عَلَى اللهِ كَذِبًا إِنْ عُدْنَا فِي مِلَّتِكُم بَعْدَ إِذْ نَجَّيْنَا اللهُ
from it, and not it is for us that we return in it except that Allah (SWT) our Lord willsمِنْهَا وَمَا يَكُوْنُ لَنَآ أَن نَّعُوْدَ فِيْهَآ إِلَّآ أَن يَشَآءَ اللهُ رَبُّنَا
our Lord encompasses everything in knowledge, upon Allah (SWT) we put our trustوَسِعَ رَبُّنَا كُلَّ شَيْءٍ عِلْمًا عَلَى اللهِ تَوَكَّلْنَا
7-89our Lord, decide (give victory) between us and between our people in truth and You are best of those who decide (opener)رَبَّنَا افْتَحْ بَيْنَنَا وَبَيْنَ قَوْمِنَا بِالحَقِّ وَأَنْتَ خَيْرُ الفَاتِحِيْنَ
7-155
8-30
10-109
12-59
12-80
21-89
22-58
23-29
23-72
23-109
23-118
34-39
62-11
98-7Truly those who believe and do righteous deeds, those are the best of creaturesإِنَّ الَّذِيْنَ ءَامَنُوْا وَعَمِلُوْا الصَّالِحَاتِ أُلَآئِكَ هُمْ خَيْرُ الْبَرِيَّةِ