The term USE A DIRK is a crossword solution that can be broken down into two words: USE A and DIRK. The word USE A is a verb phrase meaning to employ or make USE of something. The word DIRK is a noun referring to a long, pointed dagger. Therefore, the phrase USE A DIRK can be interpreted as using a dagger as a weapon. Historically, dirks were used by Scottish Highlanders as a form of self-defense and were also used in ceremonial occasions.