It is common to speak of "elaborating on (or upon) a topic." However, I have been told that this is appropriate only when some explanation has already been given; if no information is yet known, then the proper usage would be "elaborating the topic." Is it true or false?
For example, if the president issued a statement, and I wanted to explain why he did so, I might say, "I would like to elaborate the motive behind the president's statement." It wouldn't be correct to say "elaborate on the motive," since nothing is yet known about the motive.
Best Answer
Yes, there may be a distinction between "elaborate" used with a normal direct object and "elaborate on" used with a prepositional object: the former, where it is used, tends to mean "create, establish", whereas the latter tends to mean "give further details about". If you look at these examples from the Europarl corpus:
http://www.translationexamples.com/ex/en-fr/elaborate
you'll see examples such as:
where the implication does appear to be create a plan, not develop one already in existence, vs:
where the idea is "go into more detail".
As an informal intuitive observation, I would have said that the first usage isn't very common. However, I did a quick check on Google ngram and the figures appear to belie my intuition:
If these figures are anything to go by, "elaborate on" appears to be a relatively recent innovation, vs a time when "elaborate" was practically always used with a 'straight' direct object.
Interestingly, as testimony to this being a relatively recent innovation, Websters 1913 edition doesn't appear to mention the possibility of "elaborate" with 'on', but gives the following definition and example of transitive 'elaborate':