to express gratitude, appreciation, or acknowledgment to: She thanked them for their hospitality.
noun
Usually thanks . a grateful feeling or acknowledgment of a benefit, favor, or the like, expressed by words or otherwise: to return a borrowed book with thanks.
interjection
thanks,(used as an informal expression of gratitude, appreciation, or acknowledgment).
Idioms for thank
have oneself to thank, to be personally to blame; have the responsibility: The citizens have only themselves to thank for corruption in government.
no thanks to, (used to express annoyance) not owing to: I caught my flight after all, no thanks to you.
thank God, (used as an interjection to express relief, thankfulness, etc.)Also thank goodness,thank heaven .
thanks to, (used to express gratitude or blame) because of; owing to: Thanks to good organization and hard work, the benefit concert was a great success.The case went poorly thanks to the lawyer's incompetence.
thank you, (used as an interjection to express gratitude, appreciation, or acknowledgment, as for a gift, favor, service, or courtesy).
Origin of thank
First recorded before 900; Middle English (noun) “favorable thought, goodwill, gratitude,” (in singular and plural) expression of thanks; Old English thanc (in singular) expression of thanks, originally, “thought, thoughtfulness”; akin to think1
OTHER WORDS FROM thank
thanker,nounre·thank,verb (used with object)un·thanked,adjectiveun·thank·ing,adjective