drilling -
A heavy, twilled fabric of linen or cotton; drill.
drilling -
A long firearm with three or rarely, four barrels.
Verb
drilling -
Present participle of drill.
Wikipedia
Drilling is a cutting process that uses a drill bit to cut or enlarge a hole in solid materials. The drill bit is a multipoint, end cutting tool. It cuts by applying pressure and rotation to the workpiece, which forms chips at the cutting edge.
OmegaWiki Dictionary
Ω
drilling The act of boring holes in the earth for finding water or oil, for geologic surveys, etc.