A falling upon or invasion.
A particular extension of the idea of gluing.
A sloping passage or incline.
A drop to a lower status or condition; decline.
Lineage or hereditary derivation.
An instance of descending; act of coming down.
A way down.
An advance into enemy territory, an attempted invasion; an encroachment, an incursion.
Often followed by in, into, or on: initial progress made toward accomplishing a goal or solving a problem.