diff. bet. "domain transfer" and "domain host

I think the process of domain transfer and domain host are the same. I think domain transfer means we transfer our domain hosting from one (domain host provider) to the other (domain host provider). Am I correct?

Domain host is also the same. We host our domain with domain host provider. Am I correct?

I'm really confused with the concept "domain transfer" and "domain concept". I can think of them as I explained above. Please you tell me what's the difference between them.

yes... its exactly the same which you have mentioned.