The DICT Development Group

  Apropos \Ap"ro*pos`\ ([a^]p"r[-o]*p[=o]`), a. & adv. [F. [`a]
     propos; [`a] (L. ad) + propos purpose, L. proposium plan,
     purpose, fr. proponere to propose. See Propound.]
     1. Opportunely or opportune; seasonably or seasonable.
        [1913 Webster]
  
              A tale extremely apropos.             --Pope.
        [1913 Webster]
  
     2. By the way; to the purpose; suitably to the place or
        subject; -- a word used to introduce an incidental
        observation, suited to the occasion, though not strictly
        belonging to the narration.
        [1913 Webster]

  apropos
      adv 1: at an opportune time; "your letter arrived apropos" [syn:
             seasonably, timely, well-timed, apropos]
      2: introducing a different topic; in point of fact;
         "incidentally, I won't go to the party" [syn: by the way,
         by the bye, incidentally, apropos]
      adj 1: of an appropriate or pertinent nature [ant: malapropos]

  72 Moby Thesaurus words for "apropos":
     a propos, about, ad rem, adapted, admissible, against, anent,
     appertaining, applicable, applying, apposite, appropriate,
     apropos of, apt, as for, as regards, as respects, as to, becoming,
     befitting, belonging, by the by, by the way, concerning,
     dovetailing, en passant, felicitous, fit, fitted, fitting,
     for example, geared, germane, happy, in passing, in point, in re,
     in reference to, in respect to, incidentally, involving,
     just right, likely, material, meet, meshing, on the button,
     opportune, par exemple, parenthetically, pat, pertaining,
     pertinent, proper, qualified, re, regarding, relevant, respecting,
     right, seasonable, sortable, speaking of, suitable, suited,
     suiting, tailored, to the point, to the purpose, touching, toward,
     with respect to