IPA: /ˈfɛtʃər/
KK: /ˈfɛtʃər/
A person or thing that goes to get something and brings it back.
The dog is a great fetcher; it always brings the ball back to me.
Fetcher → It is formed from "fetch" (from Old English *fǣccan*, meaning to bring or take) and "-er" (meaning a person who). A fetcher is a person who brings or takes something.
Think of someone who 'brings' ('fetch') something to you — that's what a fetcher does.