How can extraneous be used in a sentence?

Answer:
Some books have so much extraneous data in them they are hard to read. Extraneous means something coming from the outside, such as source material.
It can also mean irrelevant as: Why do bicycle instructions have instructions for doll houses? Doll house assembly has nothing to do with bicycles.
It also means not a vital part of a discussion, argument, story etc. Example: General Grant was called to Washington after the victory at Vicksburg. On the way he picked some flowers and ate chocolate. He was going to meet with Lincoln to discuss the war. The second sentence has no bearing on why Grant was going to Washington.
First answer by Lnwlf. Last edit by Lnwlf. Contributor trust: 54 [recommend contributor recommended]. Question popularity: 11 [recommend question].