| 1. | to express gratitude, appreciation, or acknowledgment to: She thanked them for their hospitality. |
| 2. | thank God, (used interjectionally to express relief, thankfulness, etc.) Also, thank goodness, thank heaven. |
| 3. | 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. |
| 4. | thanks, (used as an informal expression of gratitude, appreciation, or acknowledgment). |
| 5. | have oneself to thank, to be personally to blame; have the responsibility: The citizens have only themselves to thank for corruption in government. |
| 6. | thanks to, because of; owing to: Thanks to good organization and hard work, the benefit concert was a great success. |
| 7. | thank you, (used interjectionally to express gratitude, appreciation, or acknowledgment, as for a gift, favor, service, or courtesy). |

thanks to
On account of, because of, as in Thanks to your help, we'll be done on time. This phrase alludes to gratitude being due to someone or something. It is also put negatively, no thanks to, meaning "without the benefit of help from," as in We finally found your house, no thanks to the confusing map you drew. This usage, first recorded in 1633, is about a hundred years older than the first term, recorded only in 1737.