Seduce vs Undefined - What's the difference?

As a verb seduce

is to beguile or lure someone away from duty, accepted principles, or proper conduct; to lead astray.

lacking a definition or value.

To beguile or lure someone away from duty, accepted principles, or proper conduct; to lead astray.

Your father was seduced by the dark side of The Force.'' - Obi Wan Kenobi, ''

To entice or induce someone to engage in a sexual relationship.

Mrs. Robinson, are you trying to seduce me?'' - Benjamin Braddock, ''

(by extension, euphemistic) To have sexual intercourse with.

He had repeatedly seduced the girl in his car, hotels and his home.

To win over or attract someone.

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(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