al-Nār is interpreted in three ways:
1. al-Nār is used in the sense of nūr (light / illumination); as in the following verse:
Indeed, I perceived a nār (that is, nūr [light / illumination]). (Ṭā-Hā 20:10)
A similar usage is also found in the surahs of al-Naml and al-Qaṣaṣ.
2. The term al-Nār is used in the following verse as a parable to express the Jews' decision to wage war against the Prophet (peace and blessings be upon him):
Whenever they kindled a fire for war—meaning, whenever the Jews decided to fight the Prophet—Allah extinguished it (that is, He extinguished it by dispersing their ranks). (al-Māʾida 5:64)
3. The word al-Nār means that which burns: fire; as in the following verses:
Protect yourselves from that nār (that is, the fire of Hell); its fuel is people and stones. (al-Baqara 2:24)
A similar usage occurs in Sūrat al-Taḥrīm.
That kindled nār (that is, fire)... (al-Burūj 85:3) There are many similar statements.