Exemplary vs Undefined - What's the difference?

As adjectives the difference between exemplary and undefined

is that exemplary is deserving honour, respect and admiration while undefined is lacking a definition or value.

is (obsolete) an example, or typical instance; an exemplar.

(en adjective)

Deserving honour, respect and admiration.

Of such high quality that it should serve as an example to be imitated.

* Francis Bacon

[Bishops'] lives and doctrines ought to be exemplary .

Ideal or perfect.

Serving as a warning; monitory.

as, exemplary justice, punishment, or damages

(exemplaries)

(obsolete) An example, or typical instance; an exemplar

(obsolete) A copy of a book or writing.

(Donne)

(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