Meaning
Rapture, ecstatic joy, especially the elation stirred by music.
How Iqbal uses it
Iqbal links tarab to the listener attuned to inner clamour; true joy belongs to the ear that is intimate with the hidden melody rather than the surface noise.
See it in the verse
Tarab in Iqbal’s couplets
Main jo sar-ba-sajda hua kabhi to zameen se aane lagi sada
Tera dil to hai sanam-aashna tujhe kya milega namaz mein
Tera dil to hai sanam-aashna tujhe kya milega namaz mein
Whenever I bowed my head in prostration, a voice rose from the earth: your heart is in love with idols — what will you gain from prayer?
Self-Knowledge · Humility
Khuda tujhe kisi toofan se aashna kar de
Ki tere bahr ki maujon mein iztirab nahin
Ki tere bahr ki maujon mein iztirab nahin
May God acquaint you with some storm — for the waves of your sea carry no restlessness in them.
Restlessness · Adversity