(1):

(n.) The photography of distant objects in more enlarged form than is possible by the ordinary means, usually by a camera provided with a telephoto lens or mounted in place of the eyepiece of a telescope, so that the real or a magnified image falls on the sensitive plate.

(2):

(n.) Less properly, phototelegraphy.

(3):

(n.) Art or process of electrically transmitting and reproducing photographic or other pictures at a distance by methods similar to those used in electric telegraphy.