Noun

(en noun)

A long Scottish dagger with a straight blade.

* 1883 ,

In half a minute he had reached the port scuppers, and picked, out of a coil of rope, a long knife, or rather a short dirk , discolored to the hilt with blood.

(US, Midwest, dated, slang) A penis; dork.

* May 1964 , Lawrence Poston, "Some Problems in the Study of Campus Slang", American Speech volume 39, issue 2

The word dick'' itself serves as model for two variants which are probably Midwestern, ''dirk'' and ''dork , also meaning "penis"...

(US, Midwest, dated, slang) A socially unacceptable person; an oddball.

* May 1964 , Lawrence Poston, "Some Problems in the Study of Campus Slang", American Speech volume 39, issue 2

...on at least one Midwestern campus a dirk'' may be an "oddball" student, while a ''prick (more common) is of course an offensive one.

Noun

A short sharp knife or dagger-like weapon intended for stabbing.

*{{quote-book, year=1905, author=

, title= , chapter=1 citation , passage=“There the cause of death was soon ascertained?; the victim of this daring outrage had been stabbed to death from ear to ear with a long, sharp instrument, in shape like an antique stiletto , which […] was subsequently found under the cushions of the hansom. […]”}}

A rapier.

An awl.

A woman's shoe with a tall, slender heel (stiletto heel).

A beard trimmed into a pointed form.

* Ford

The very quack of fashions, the very he that / Wears a stiletto on his chin.