Longman Dictionary of Contemporary English - thank

~ v 1 to tell someone that you are pleased and grateful for something they have done, or to be polite about it  (Remember to thank Uncle Robin when you see him. | thank sb for)  (Meg and Jo ran to thank their aunt for the presents. | thank sb for doing sth)  (I must write and thank him for sending the cheque.) 2 thank God/goodness/heavens used to show that you are very glad about something  (Thank God that's over! I've never been so nervous in my life!) + for  ("Your son is safe!" "Thank heavens for that!")  (- see God) 3 have sb to thank (for sth) used when saying who is responsible for something helpful or, humorously, who is responsible for something unhelpful  (I have Phil to thank for getting me my first job. | And who do I have to thank for that mess on my desk?) 4 only have yourself to thank (for sth) spoken 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.) 5 sb won't thank you (for doing something) 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.) 6 thank your lucky stars spoken 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!) 7 you'll thank me spoken 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.) 8 I'll thank you to do sth 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.)  (- see also thank you)