TelharmonyTel*har"mo*ny\ [?]), at a distant point or points by means of alternating currents of electricity controlled by an operator who plays on a keyboard. The music is produced by a receiving instrument similar or analogous to the telephone, but not held to the ear. The pitch corresponds with frequency of alternation of current. Telltale \Tell"tale`\, n. 1. A thing that serves to disclose something or give information; a hint or indication. It supplies many useful links and telltales. --Saintsbury. 2. (Railroads) An arrangement consisting of long strips, as of rope, wire, or leather, hanging from a bar over railroad tracks, in such a position as to warn freight brakemen of their approach to a low overhead bridge.