1.
drill (tool)
A power tool or hand tool used for boring holes in hard materials.
2.
practice workbook, drill exercises
A workbook containing repetitive exercises for students to practice skills, especially in math or kanji. Widely used in Japanese elementary education.
Usage
Sense 2 is extremely common in the context of Japanese elementary education. ドリル workbooks are a staple of daily homework and summer assignments. Parents often buy additional ドリル for extra practice.