practice noun (ACTION)
› [U, not gradable] action rather than thought or ideas:
It seemed like a good idea, but in practice it was a disaster.
How soon will the new procedures be put into practice?
practice noun (REGULAR ACTIVITY)
› [C/U] something that is usually or regularly done, often as a habit, tradition, or custom:
[U] It was his usual practice to buy a newspaper every morning on the way to the office.
Idioms
practice what you preach