Elaborate as an adjective means "worked out," complicated in exacting detail. As a verb it means to develop thoroughly, or to explain at length. elaborate means very detailed. For instance, "the elaborate ACT book really prepared me for the exam"
When you elaborate on something you go into greater detail...so you can explain something and if someone needs more information on the subject they might say "can you elaborate on that"
The mean distance is the same as the mean of a set of numbers,but this time, instead of them just being numbers, they're lengths. You just simply add up all the numbers and divide the total length,...