1. express gratitude to (someone), especially by saying ‘Thank you’: "Mac thanked her for the meal and left"Similarexpress (one's) gratitude toexpress one's thanks tooffer/extend thanks tosay thank you toshow appreciation to
▪ used ironically to assign blame or responsibility for something:"you have only yourself to thank for the plight you are in"Similarblamehold responsible
Word OriginOld Englishthancian, of Germanic origin; related to Dutch and German danken; compare with thanks.