Thanksgiving (noun)

1. The act of giving thanks, especially to God.
2. A prayer expressing gratitude.
3. A public holiday in the United States and Canada, typically celebrated on the fourth Thursday in November, on which people give thanks for the blessings of the past year.

Origin:

The word thanksgiving comes from the old english word "þancsgiuing" which means the act of giving thanks.

Examples:

1. The family said a prayer of thanksgiving before the meal.
2. The pilgrims had a thanksgiving feast to celebrate their first harvest in the New World.
3. Thanksgiving is a time for family and friends to gather and give thanks.
4. She made a list of things she was thankful for on Thanksgiving.
5. The church held a special service of thanksgiving on Sunday.