Do You Know the Definition of the Word or Whom Should You Thank Today?

Thanksgiving – noun (dictionary.com)
1. the act of giving thanks; grateful acknowledgment of benefits or favors, especially to God.
2. an expression of thanks, especially to God.
3. a public celebration in acknowledgment of divine favor or kindness.
4. a day set apart for giving thanks to God.
5. (initial capital letter) Thanksgiving Day.
http://www.dictionary.com/browse/thanksgiving