Ap″ro‐pos′ (ăp″rō̍‐pō′), a. & adv. [F. à propos; à (L. ad) + propos purpose, L. proposium plan, purpose, fr. proponere to propose. See Propound.] 1. Opportunely or opportune; seasonably or seasonable.
A tale extremely apropos.
Pope.
2. By the way; to the purpose; relevant; 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.