Home › Words › S › subdrillsubdrillsubdrill means A training exercise forming part of a larger training exercise or system.Among words judged in Lexicurio's Arena, subdrill ranks #12,649 of 42,747 for Qualifying.EtymologyFrom sub- + drill.nounA training exercise forming part of a larger training exercise or system.e.g.“Learners can go through the series of subdrills and review old drills in a systematic manner. The various subdrills may be selected by the learner from a menu such as that shown in Fig. 4.11.” — 2013, David Jonassen, Instruction Design for Microcomputing Software:Definitions & examples from Wiktionary (CC BY-SA 3.0).