\Drill"ing\, n.
1. The act of piercing with a drill.
2. A training by repeated exercises.

\Drill"ing\, n.
The act of using a drill in sowing seeds.

\Drill"ing\, n. [G. drillich, fr. L. trilix having
three threads, fr. the of tres three + licium a thread of the
warm. See {Three}, and cf. {Twill}.] (Manuf.)
A heavy, twilled fabric of linen or cotton.