thank you

Từ điển Oxford Advanced Learner 8th

ˈthank you [thank you] exclamation, noun BrE NAmE
exclamation
see also ↑thanks
1. used to show that you are grateful to sb for sth they have done
•~ (for sth) Thank you for your letter.
•~ (for doing sth) Thank you very much for sending the photos.
2. a polite way of accepting sth that sb has offered you
• ‘Would you like some help with that?’ ‘Oh, thank you.’
3. no thank youa polite way of refusing sth that sb has offered you
• ‘Would you like some more cake?’ ‘No thank you.’
4. used at the end of a sentence to tell sb firmly that you do not need their help or advice
• ‘Shall I do that?’ ‘I can do it myself, thank you.’
 
noun usually singular ~ (to sb) (for sth)
an act, a gift, a comment, etc. intended to thank sb for sth they have done
• The actor sent a big thank you to all his fans for their letters of support.
• She took the money without so much as a thank you.
•a thank-you letter

Example Bank:
•He didn't even say thank you.
•I would just like to say a personal thank you to all the people who contributed to this appeal.
•She got a special thank you for all her hard work.
•a big thank you to the hospital staff