a propósito

Preposition

 * 1) apropos regarding or concerning

Prepositional phrase

 * 1) by the way incidentally

Adjective

 * 1) apropos; suitable

Adverb

 * 1) by the way, incidentally
 * 2) on purpose, purposely
 * 1) on purpose, purposely
 * 1) on purpose, purposely