Fit or convenient time; a time favorable for the purpose; suitable time combined with other favorable circumstances. Suitableness of time is the predominant signification, but it includes generally circumstances of place and other conveniences adapted to the end desired. A wise man will make more opportunities than he finds. I had an opportunity to see the cloud descent. Neglect no opportunity of doing good.

Convenient means. I had an opportunity of sending the letter, or no opportunity to send it. Opportunities rarely occur on frequently offer.