A competitor is someone who competes against someone or contends for something.
Positive: If you are competing in a dream it could represent that you are fighting the good fight of faith against the enemy. It could also represent that God is giving you power to prevail against a person or a thing.
Negative: If you are competing in a dream out of ambition or to tear someone down, it could represent your pride or motivation to win because of an envious heart against someone.
(Genesis 32:28; Philippians 2:3-4; Luke 16:15; Ecclesiastes 4:4).