What is the meaning of “Alive” (al-Hayy) when attributed to Allah?
Allah is Alive (al-Hayy,) meaning He is the One attributed with an Eternal and Everlasting Life which is not of a soul, flesh, blood, ligaments, or bone marrow. Allah said in Surat al-Baqarah verse #255
﴿اللهُ لاَ إِلَهَ إِلاَّ هُوَ اْلحَيُّ اْلقَيُّومُ﴾ سورة البقرة
This verse means: [No one is God other than Allah, the One Who is Alive and does not need anyone.]
Allah also said in Surat al-Furqan verse #58
﴿وَتوَكَّلْ عَلَى اْلَحيِّ الَّذِي لاَ يَمُوتُ﴾ سورة الفرقان
This verse means: [And rely upon the One Who is alive Who does not die].