1. (

• drilling ,
• boring ,

) the act of drilling ;

2. (

• boring ,
• drilling ,
• oil_production

) the act of drilling a hole in the earth in the hope of producing petroleum ;

1. (

• bore ,
• drill

) 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"; "carpenter bees are boring holes into the wall" ;

2. (

• drill ,

) train in the military, e.g., in the use of weapons ;

3. (

• drill ,
• exercise ,
• practice ,
• practise

) learn by repetition; "We drilled French verbs every day"; "Pianists practice scales" ;

4. (

• drill ,

) teach by repetition ;

5. (

• drill ,

) undergo military training or do military exercises ;