Definition of "apropos" in English

adjective

1. Of an appropriate or pertinent nature.

2. By the way, incidental.

preposition

1. Regarding, concerning, in regard to, on the subject of:

adverb

1. By the way.

2. Timely; at a good time.

3. To the purpose; appropriately.

noun

1. (obsolete) Fittingness, pertinence.