n. The start of the ninth hour of the day in both the 12-hour and the 24-hour clock; 8:00.
Usage examples of "eight o'clock".
At some point some way up the pass, which I have marked with a cross, I and my men with the 'babies' will be waiting for you to-morrow evening at eight o'clock.
At eight o'clock, I polished off a cup of coffee and the last bite of a doughnut, brushed the crumbs off my uniform, and drove to the high school to do what I could to get everybody through the day without undue bloodshed.
It was one of those rare hot days in Scotland, when the sun blazes out of a bleached muslin sky and the early haze is burnt away by eight o'clock.