Overlay – definition of overlay by The Free Dictionary

Nor wanted clouds of foot, nor, on each horn, Cuirassiers all in steel for standing fight, Chariots, or elephants indorsed with towers Of archers; nor of labouring pioners A multitude, with spades and axes armed, To lay hills plain, fell woods, or valleys fill, Or where plain was raise hill, or overlay With bridges rivers proud, as with a yoke: Mules after these, camels and dromedaries, And …

https://www.thefreedictionary.com/overlay