atheltic games and contests, 1590s, from sport (n.). Meaning "sports section of a newspaper" is 1913. As an adjective from 1897. Sports fan attested from 1921. Sports car attested by 1914; so called for its speed and power:
I have just returned from the south of France, passing through Lyons, where I visited the [Berliet] works with my car, and was shown the new model 25 h.p. "sports" car, and was so impressed with this that I immediately ordered one on my return to London. [letter in The Autocar, Jan. 7, 1914]
broadcast adj.
1767, "dispersed upon the ground by hand," in reference to seed, from broad (adj.) + past participle of cast (v.). The figurative sense of "widely spread" is recorded by 1785. As an adverb from 1832. The modern media use began with radio (1922, adjective and noun). As a verb, recorded from 1813 in an agricultural sense, 1829 in a figurative sense, 1921 in reference to radio.