apropos

adv. opportunely, to the purpose; concerning; by the way

adj. relevant, being both pertinent and well-timed

prep. with regard to, with reference to

Apropos (French for about "à propos") may refer to:an application used in Call centres to manage callsa Unix program
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Adjective
1. of an appropriate or pertinent nature
(antonym) malapropos
(similar) apposite, appropriate, apt, pertinent
(see-also) appropriate
(attribute) appropriateness
Adverb
1. by the way; "apropos, can you lend me some money for the weekend?"
(synonym) incidentally
2. at an opportune time; "your letter arrived apropos"
(synonym) seasonably, timely, well-timed

adv. apropos, opportunely, to the purpose; (Archaic) by the way

interj. apropos