1. Having a flat, horizontal, or smooth surface: "The campers set up their tents on level ground."

"The recipe indicated that there should be a level tablespoon of sugar which fills the spoon exactly without going any higher than the edges."
2. Descriptive of being without irregularities, roughness, or indentations: "The carpenter made the floor as smooth and level as possible."
3. Steady and calm: "The teacher spoke to her students in a level voice when she told them that everyone had passed the test."

"Brian's brother tried his level best to win the race."