quote:
ap·ro·pos (adj.)
Being at once opportune and to the point. See Synonyms at relevant.
adv.
At an appropriate time; opportunely.
By the way; incidentally: Apropos, where were you yesterday?
prep.
With regard to; concerning: Apropos our date for lunch, I can't go.
Oh I get it. It's opportune and to the point of nothing. Now it makes perfect sense!