To make a similar or identical version of something. She copied the document to ensure she had a backup.
To imitate or reproduce someone's actions or behavior. The child copied his older brother's mannerisms.
To reproduce text or data from one location to another, especially in computing. He copied the file from his computer to the external hard drive.
To receive and understand (a radio, telephone, or other transmitted message). "Copy that," the pilot responded over the radio.