Encapsulate vs Undefined - What's the difference?

As a verb encapsulate

is (label) to enclose something as if in a capsule.

lacking a definition or value.

* (l)

(encapsulat)

(label) To enclose something as if in a capsule.

* 2014 Feb. 9, Matthew L. Wald, " Nuclear Waste Solution Seen in Desert Salt Beds," New York Times (retrieved 14 June 2014):

At a rate of six inches a year, the salt closes in on the waste and encapsulates it for what engineers say will be millions of years.

(label) To epitomize something by expressing it as a brief summary.

* '>citation

To enclose objects in a common interface in a way that makes them interchangeable, and guards their states from invalid changes.

(label) To enclose data in packets that can be transmitted using a given protocol.

* encapsulation

(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