Dominant (adjective)

1. Having control or power over others; commanding.
2. Most important, powerful, or influential.
3. Having or exercising the power of ruling; governing.

Origin:

Early 17th century: from latin dominant- 'ruling', from the verb dominari. the noun use (sense 2) dates from the early 20th century.

Examples:

1. She was the dominant figure in the room, commanding attention with her presence.
2. The dominant culture in the country was Spanish.
3. The dominant theme in the paintings was of rural life and nature.
4. The dominant economic power in the region shifted from the United States to China.
5. The dominant military force in the area was the army, which maintained control and stability.