Dictionary![]() ![]() thank-youPronunciation: (thangk'yOO"), [key] —adj. expressing one's gratitude or thanks: a thank-you note. —n. an expression of thanks, as by saying “thank you”: I never got so much as a thank-you for helping him. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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