Thanksgiving is a holiday representing thankfulness and can be an expression of gratitude toward God. A cornucopia usually symbolizes thanksgiving which is representative of a harvest.

Positive: In a dream, having thanksgiving dinner could represent that you are expressing thankfulness to the Lord. It could also represent blessings that will follow thanksgiving toward the Lord.

Negative: Dreaming of no one showing up to a thanksgiving dinner could represent a lack of thankfulness in your life resulting in barrenness.

(2 Corinthians 4:15; 2 Chronicles 5:13; 2 Corinthians 9:11; Jeremiah 30:19; Philippians 4:6-7; 1 Timothy 4:4-5; Psalm 7:17).