Dreaming of a competition may mean you want to overcome your fear of losing. Perhaps you cannot lose and every failure is a painful experience for you.
A competition can also be a positive sign, especially if it is connected with the dreamer's steadfast character.
to see - someone will try to waste your precious time in vain
take part - you feel the need to develop, to achieve it you need to be assertive, alternatively a dream may reflect anxiety about a competitor that appeared in your life
win - you have the necessary skills to achieve a set goal or solve a problem in your waking life
lose in a competition - it bodes failure or futile efforts.
More dream interpretation: