Meaning
The prostration of longing; a bowing-down driven by ardent love or devotion.
Literally: prostration of yearning
How Iqbal uses it
The lover's or seeker's prostration offered not from duty but from burning love; the sajda-e-shauq is worship that the heart, not the law, demands.
See it in the verse
Sajda-e-shauq in Iqbal’s couplets
Ye ek sajda jise tu garaan samajhta hai
Hazaar sajdon se deta hai aadmi ko nijaat
Hazaar sajdon se deta hai aadmi ko nijaat
This one act of devotion, which you find so heavy to make — it frees a person from a thousand servile bowings.
Freedom · Selfhood
Mana ki teri deed ke qabil nahin hoon main
Tu mera shauq dekh mera intizar dekh
Tu mera shauq dekh mera intizar dekh
Granted, I am not yet worthy of the sight of you — but look at my longing, look at how I wait.
Humility · Love · Aspiration