Definition of: apropos

(ap′rə·pō′) adjective
1. Suited to the time, place, or occasion; pertinent; opportune: an apropos remark.
—adverb
1. With reference or regard; in respect; as suggested by: with of: apropos of spring.
2. To the purpose; at the proper time; in the proper way; pertinently; appropriately: He spoke quite apropos.
3. By the way; incidentally: used to introduce a remark or observation. [< F à propos < à to + propos purpose]