Definition of "thank" in English

noun

1. (obsolete) singular of thanks (“an expression of appreciation or gratitude; grateful feelings or thoughts; favour, goodwill, graciousness”)

verb

1. To express appreciation or gratitude toward (someone or something).

   • She thanked him for the lift.

2. In the future tense in the form one will thank someone to do something, chiefly expressing a command or criticism: to request that (someone) do something.

   • I’ll thank you not to smoke in my house!

3. To express appreciation or gratitude for (something).

4. To respond to (someone) out of, or as if out of, appreciation or gratitude.

5. Chiefly followed by for: to credit or hold (someone or something) responsible, especially for something negative; to blame.

   • We can thank global warming for this freak weather.

6. (intransitive, obsolete) To express gratitude.