1. The process or act of using a drill to make a hole
   "The construction worker's drilling through the concrete wall was loud and dusty";
   - boring
    
2. The act of drilling a hole in the earth in the hope of producing petroleum
   "The country's economy relied heavily on drilling";
   - boring, oil production

1. Make a hole, especially with a pointed power or hand tool
   "don't drill here, there's a gas pipe"; "drill a hole into the wall"; "drill for oil";
   - bore
    
2. Repeat an activity or skill many times or regularly to improve or maintain proficiency
   "We drilled French verbs every day";
   - exercise, practice [N. Amer], practise [Brit, Cdn]
    
3. Teach by repetition
   "The teacher drilled the multiplication tables into the students' heads"
    
4. Undergo military training or do military exercises
   "The soldiers drilled for hours in the hot sun"

Derived forms: drillings

Type of: creating by removal, develop, disunite, divide, educate, instruct, learn, part, prepare, production, read, separate, study, take, teach, train

Encyclopedia: Drilling