Leave/let somebody/something be Definition 1 of 3Pro Tip 1/3Personal Space Used when someone needs privacy or time alone without interruption. She was so upset, we decided to let her be for a while. Pro Tip 2/3Informal Setting Commonly used in casual conversations among friends and family. Dinner's ready, but he's in his game right now, so let him be. Pro Tip 3/3Respecting Choices Implies respecting someone's decision even if you disagree. He's chosen a difficult career path, but let him be - it's his life.