1. the number eight.
2. a group of eight.
Origin: 1615-25; < Late Latin ogdoad- (stem of ogdoas) < Greek ogdoás, derivative of ógdoos eighth; see -ad
Now YOU come up with a sentence (or fic? or graphic?) that best illustrates the word.
Also, I totally didn't plan it so that this word was done on the 8th day.