What is wireless telegraphy or telephony?

The technical term 'wireless telegraphy' has two distinct senses:

1: Where 'wireless' is an adjective qualifying the Word 'telegraphy', meaning the kind of telegraphy that uses transmission by radio signals instead of over wires;

2: Where 'wireless telegraphy' is a noun phrase, meaning the use of radio signals to send telegraphic messages, usually by Morse Code.