Fetch vs. Collect vs. Get vs. Pick up

Fetch
Fetch is especially a British word meaning: To go to the place where someone/something is and bring them back.

- My brother fetched me from the airport in his car.
- He was in a hurry to fetch his sister from his house.
- I went down and fetched her back at the weekend.

Fetch is used in American English as a command to a dog to go and bring something back to you which you have thrown.

Collect
Collect is a British word,too, meaning bringing someone/something back from where he's waiting or from the place they have been left.

- I have to collect my children from school at 3 o'clock every day.
- Could you collect me from the airport at 4 a.m.

Get
Get means: To go to the place where someone/something is and bring them back.

- I'm going to go get the kids from the babysitter's.
- Go and get your dady for me.
- He went to get his sister from the hospital.

Pick up
Pick up is especially an American word meaning :Going somewhere usually in a car in order to get someone/something :

- Whose turn is it to pick up the children after school.
- My wife is going to pick up her father from the station.
- I picked her up at Cavent Garden to take her to lunch with my mother.