Both Uses

elaborate
in
The Lucky One
(Edited)

There was just something exciting about maintaining the pretense that nothing had changed between them; it gave the relationship an illicit feeling, almost like an affair. ... Every now and then while Beth and Logan were engaged in keeping up their elaborate facade, Nana would mutter something nonsensical like "camels in the Sahara" or "it's like hair and slippers."
Chpt 18 *

elaborate = complicated
When he spoke, his voice was steady, like a professor elaborating on a subject he taught.
Chpt 18 *

elaborating = explaining in detail

Definitions:

(1) (elaborate as in: elaborate on your plan)
add details or explain in detail
(2) (elaborate as in: an elaborate design)
having details and complexity -- sometimes fancy or ornate
Depending upon it's context, this sense of elaborate can additionally imply that details make something either:
- more special than others of its kind in a good way
or:
- more complicated than necessary in a bad way
(3) (elaborate as in: an elaborate wink)
to exaggerate an action

At times, this sense of elaborate can further imply that an action was exaggerated by prolonging it (performing it more slowly than normal).
(4) (meaning too rare to warrant focus)