|1.||to remove (soil, earth, etc) by digging; dig out|
|2.||to make (a hole, cavity, or tunnel) in (solid matter) by hollowing or removing the centre or inner part: to excavate a tooth|
|3.||to unearth (buried objects) methodically in an attempt to discover information about the past|
|[C16: from Latin excavāre, from cavāre to make hollow, from cavus hollow]|
excavation ex·ca·va·tion (ěk'skə-vā'shən)
A natural cavity, pouch, or recess.
A cavity formed artificially or as the result of a pathological process.