Meaning
Gardens of paradise (plural of jannat).
Literally: Plural of jannah, a garden.
How Iqbal uses it
The rashk-e-jinan phrase sets the homeland's living gardens above the celestial jinan, so that the gardens of heaven themselves are imagined envying the watered soil of the motherland.
See it in the verse
Jinan in Iqbal’s couplets
Amal se zindagi banti hai jannat bhi jahannum bhi
Ye khaki apni fitrat mein na noori hai na naari hai
Ye khaki apni fitrat mein na noori hai na naari hai
By our deeds we make life a heaven or a hell. This creature of dust is, by nature, neither angel of light nor demon of fire.
Action · Courage
Ilm mein bhi suroor hai lekin
Ye wo jannat hai jis mein hoor nahin
Ye wo jannat hai jis mein hoor nahin
There is a certain delight in knowledge too — but it is a paradise without companions.
Self-Knowledge · Love · Humility