What is earn? What is earn? To gain especially for the performance of service, labor, or work: earned money by mowing lawns. To acquire or deserve as a result of effort or action: She earned a reputation as a hard worker. To yield as return or profit: a savings account that earns interest on deposited funds. spurs To gain a position through hard work and the accumulation of experience, often in the face of difficulties.Obsolete To yearn.