1. Highest in authority; holding the highest place in authority, government, or power. He that is the supreme king of kings. (Shak)
2. Highest; greatest; most excellent or most extreme; utmost; greatist possible (sometimes in a bad sense); as, supreme love; supreme glory; supreme magnanimity; supreme folly. Each would be supreme within its own sphere, and those spheres could not but clash. (De Quincey)
3. (Science: botany) Situated at the highest part or point. The Supreme, the Almighty; god.
Origin: L. Supremus, superlative of superus that is above, upper, fr. Super above: cf. F. Supreme. See Super-, and cf. Sum.