Training is the process of bringing a person to an agreed standard of proficiency by practice and instruction.
As an example from the Gunsite home page:
Gunsite offers firearms training to elite military personnel, law enforcement officers and free citizens of the US.
Gunsite will give you the training
if you give them the dollars. To maintain or improve your proficiency, it's up to you to practice
what you've learned once you leave.
If you're watching a classroom video then you're in training.
If you're reading a book on shooting fundamentals then you're in training.
If you're sitting in a classroom listening to a firearms instructor then you're in training.
If you're on the range with an instructor being instructed then you're in training.
If you're on the range attempting to maintain or improve your proficiency at things you've previously learned, then you're practicing.
Training consists of both practice and instruction.