Doot vs Undefined - What's the difference?

As a verb doot

is (chiefly|scotland) doubt.

lacking a definition or value.

(head)

(chiefly, Scotland) doubt

* {{quote-book, year=1902, author=Jack London, title=A Daughter of the Snows, chapter=, edition= citation

, passage="Mair'd be a bother; an' I doot not ye'll mak' it all richt, lad." }}

* {{quote-book, year=1917, author=John Hay Beith, title=All In It: K(1) Carries On, chapter=, edition= citation

, passage=No doot he'll try to pass himself off as an officer, for to get better quarters!" }}

(chiefly, Scotland) think

* {{quote-book, year=1920, author=James C. Welsh, title=The Underworld, chapter=, edition= citation

, passage="I think my pipe's on the mantelshelf," returned Geordie, "but I doot it's empty." }}

* ----

(wikipedia undefined) (-)

Lacking a definition or value.

(mathematics, computing) That does not have a meaning and is thus not assigned an interpretation.

The result of division by zero is undefined .

* defined