Deceit refers to the act of misleading or tricking someone by presenting false information or concealing the truth. It can occur in various contexts, such as personal relationships, business dealings, or legal matters. Deceit often involves manipulation and can lead to a breach of trust between individuals or groups. Common forms of deceit include lying, fraud, and misrepresentation. In literature and psychology, deceit is often explored to understand human behavior and motivations. Notable examples of deceit can be found in works like Shakespeare's Othello or in real-life cases of corporate fraud.