What does "unconscious" mean? What's the opposite word of this?

Rebecca

To be "unconscious" means to be in a state of having lost lucidness and in a state of sleep due to an injury or other medical reason. The opposite of being "unconscious" is to be "conscious," which means to be aware, alert, and responsive. Ex: The man was knocked unconscious by the robber. Ex: He lost consciousness due to the car crash.