What is the meaning of Thank?

singular of thanks (an expression of appreciation or gratitude; grateful feelings or thoughts; favour, goodwill, graciousness)

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

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

    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.

    To express appreciation or gratitude for (something).

    1. To respond to (someone) out of, or as if out of, appreciation or gratitude.
    2. Chiefly followed by for: to credit or hold (someone or something) responsible, especially for something negative; to blame.

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

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

      To express gratitude.

      to thank

      Source: wiktionary.org