thank S1 W2 [transitive]
to tell someone that you are pleased and grateful for something they have done, or to be polite about it:
I haven't had a chance to thank him yet.
thank somebody for (doing) something
Did you thank Uncle Ron for the present?
Madeleine thanked everyone for coming.
used to show that you are very glad about something:
Thank God that's over! I've never been so nervous in my life!
thank God/goodness/heavens for
'Only ten miles to go.' 'Thank heavens for that!'
used to tell someone that they are very lucky, especially because they have avoided an unpleasant or dangerous situation:
You should thank your lucky stars I got here when I did!
used to say that you are responsible for something bad that has happened to you:
She has only herself to thank if she doesn't have any friends.
used to tell someone not to be annoyed with you for doing or saying something, because it will be helpful to them later:
You'll thank me for this one day, Laura.
used to tell someone that another person will be annoyed because of what they have done:
I know you're just trying to help, but he won't thank you for telling him how to do it.
7 spoken formal
used to tell someone in an angry way not to do something because it is annoying you:
I'll thank you to mind your own business.
to say that you are grateful to someone who is responsible for something good happening. This expression is sometimes used humorously to mean that you are not grateful for what someone has done:
I have Phil to thank for getting me my first job.
And who do I have to thank for that mess on my desk?