The dead.
"The fallen soldiers were laid to rest in a quiet valley."
past participle of fall
"The leaves were scattered across the ground as a fallen result of the recent storm."
having dropped by the force of gravity
"fallen leaves covered the forest floor"
"sat on a fallen tree trunk"
Having dropped by the force of gravity.
"The apple fell from the tree and landed softly on the grass below."
In plain English: Fallen means something that has dropped to the ground after falling down.
"The leaves were scattered across the fallen branches after the storm."
The word "fallen" is formed by adding the suffix "-en" to the verb "fall." This construction indicates that the action of falling has been completed.