| a. & adv. | 1. | Opportunely or opportune; seasonably or seasonable. |
| 2. | By the way; to the purpose; 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. |
| Adj. | 1. | apropos - of an appropriate or pertinent nature Antonyms: malapropos - of an inappropriate or incorrectly applied nature |
| Adv. | 1. | apropos - by the way; "apropos, can you lend me some money for the weekend?" Synonyms: incidentally |
| 2. | apropos - at an opportune time; "your letter arrived apropos" |