According to online etymology :
1767, an adjective, in relation to the distribution of seeds, from the broad (adj.) + Participle of the past (lit.). Figurative use is recorded from 1785. The modern use of the media began with the radio (1922, adjective and noun). As a verb recorded since 1813 in an agricultural sense, 1829 in figurative sense, 1921 in relation to radio.
After some time, definitions like this appeared:
In the theory of telecommunications and information, broadcasting refers to the method of transmitting a message to all recipients simultaneously.
The definition for Numpy is based on the above:
The term "translation" describes how numpy processes arrays with different shapes during arithmetic operations. Under certain restrictions, a smaller array is “passed” through the larger array, so that they have compatible forms.