Concentration of the mental powers upon an object; a close or careful observing or listening. The ability or power to concentrate mentally. Observant consideration; notice: Your suggestion has come to our attention. Consideration or courtesy: attention to others' feelings. Acts of courtesy, consideration, or gallantry, especially by a suitor. A military posture, with the body erect, eyes to the front, arms at the sides, and heels together. Used as a command to assume an erect military posture.