[T] to recognize or understand that something is valuable, important or as describedThere's no point buying him expensive wines - he doesn't appreciate them.
We appreciate the need for immediate action.
[+ that ] I appreciate that it's a difficult decision for you to make.
[+ question word] I don't think you appreciate how much time I spent preparing this meal.
I/We appreciate... used when you are thanking someone or showing that you are gratefulWe really appreciate all the help you gave us last weekend.
[+ -ing verb] I appreciate your making the effort to come.
would appreciate used when you are politely requesting somethingI would appreciate it if you could let me know (= Please let me know) in advance whether or not you will be coming.