thank you /ˈfæŋk ˌju/exclamation 3thank-you noun 2forms 2 exclamation3 •An expression of gratitude or politeness in response to something done or given.“Thank you!” said the girl after her mom gave her a gift.“And thank you for being so sweet,” replied her mom. •Used as a polite affirmative to accept an offer.—May I help you? —Yes, thank you.—May I help you? —Thank you. •A polite dismissal; usually used in professional contexts.‘No, come in,’ he said. ‘Martin, right? Have a seat.’ […] ‘Thank you, no, I won’t.’ He moved inside a little more. — 2015 thank-you noun2 •An expression of gratitude.I must offer a big thank-you to my agent for getting me this job. •That expresses thanks.a thank-you letter formsthank yous · thank-yous
