Sometimes, telecommunication.(used with a singular verb) the transmission of information, as words, sounds, or images, usually over great distances, in the form of electromagnetic signals, as by telegraph, telephone, radio, or television.
2.
Sometimes, telecommunication.(used with a singular verb) the science and technology of such communication.
tel·e·com·mu·ni·ca·tion (těl'ĭ-kə-myōō'nĭ-kā'shən) n.
The science and technology of communication at a distance by electronic transmission of impulses, as by telegraph, cable, telephone, radio, or television. Often used in the plural with a singular verb: Telecommunications is an important area of professional growth.
The electronic systems used in transmitting messages, as by telegraph, cable, telephone, radio, or television. Often used in the plural with a plural verb: Telecommunications were disrupted by the brownout.
telecommunication (těl'ĭ-kə-my'nĭ-kā'shən) Pronunciation Key
The science and technology of sending and receiving information such as sound, visual images, or computer data over long distances through the use of electrical, radio, or light signals, using electronic devices to encode the information as signals and to decode the signals as information.
[tel-i-kuh-myoo-ni-key-shuh
nz] 
'nĭ-kā'shən) Pronunciation Key