Bible Dictionary
DAY-STAR
The day-star is the morning star, the herald of dawn. In 2 Peter 1:19 the image points to Christ’s illuminating presence, while Isaiah uses the expression in a passage concerning the king of Babylon.
Biblical Usage
Isaiah’s day-star expression concerns the king of Babylon. In 2 Peter, the day-star is used as a title of the Lord and is associated with arising in believers’ hearts.