What is the meaning of Dirk?

A long Scottish dagger with a straight blade.

A ceremonial dagger worn by naval or air force officers in some nations' militaries; formerly, a fighting dagger used by sailors as a boarding weapon.

A penis; dork.

A socially unacceptable person; an oddball.

To stab with a dirk.

To darken.

imperative of dirka

dirk

dirk

Source: wiktionary.org