Of an appropriate or pertinent nature.
by the way, incidental
Regarding or concerning.
To the purpose; appropriately.
By the way.
Timely; at a good time.
Of, containing, or being a notion; mental or imaginary.
Having descriptive value as opposed to a syntactic category.
Used to indicate an estimate or a reference amount
Full of ideas or imaginings.
Speculative, theoretical, not the result of research.
A fake company used as a front in espionage.