From the second edition (1989):
(ˈbʊlɪtɪn) Also 7 bolletine, -ettine. [In 17th c. ad. It. bullettino, bollettino dim. of bulletta = bullet n.1; but the mod. word (senses 2, 3), first recorded in latter half of 18th c., appears to be a. Fr. bulletin.]

1. a. A short note or memorandum. b. An official certificate; a warrant of appointment to an office. Obs.

[1645 Evelyn Mem. (1819) I. 181 We went now towards Ferrara, carrying with us a Bulletino or bill of health.] 1651 tr. Life Father Sarpi (1676) 46 He‥kept under Key‥ even to the least bolletines and short notes that he made. 1673 Ray Journ. Low C., Venice 178 The sealing of bollettines for them that are to undertake any new office, etc.

2. a. A short account or report of public news or events, issued by authority; applied esp., c1800, to a report sent from the seat of war by a commander for publication at home.

1791 Burke Appeal Whigs (R.) The pithy and sententious brevity of these bulletins of ancient rebellion. 1792 Ld. Spencer in Ld. Auckland's Corr. (1861) II. 474 They brought me‥a bulletin, for which I am much obliged to you. 1813 Wellington Let. in Gurw. Disp. X. 410 There is at Lisbon a newspaper of the 13th containing the French bulletin of their action. 1840 Carlyle Heroes vi, 374 ‘False as a bulletin’ became a proverb in Napoleon's time. 1880 Daily News 29 Oct., Daily bulletins of the weather are despatched to subscribers.

b. A broadcast report of news, weather, etc. Also fig.

1925 Times 23 July 8/3 The news given out as a bulletin on a very recent Sunday from the London Station must have made many listeners pause. Ibid. 3 Aug. 5/5 The news bulletins are broadcast in the exact terms in which they are received from the news agencies. 1938 Auden & Isherwood On Frontier 7 The drums tap out sensational bulletins; Frantic the efforts of the violins. 1938 Wodehouse Summer Moonshine i. 7 The weather-bulletin announcer of the British Broadcasting Corporation.

3. An official statement as to the health of an invalid.

1765 H. Walpole Corr. (1817) II. 312 The dauphin is at the point of death. Every morning the physicians frame an account of him, and happy is he or she who can produce a copy of this lie, called a bulletin. 1836 Dickens Sk. Boz 5 Verbal bulletins of the state of his health were circulated throughout the parish half-a-dozen times a day. 1870 Disraeli Lothair lix, Lothair, after having heard the first‥bulletin of the surgeon, had been obliged to leave the convent.

4. attrib., esp. in bulletin-board, (a) U.S., a notice-board; (b) a computer-based system giving users access from remote terminals to text and programs contributed by one another and stored centrally.

1831 Boston Transcript 5 July 2/4 From the City Hall Bulletin Board. 1869 ‘Mark Twain’ Innoc. Abr. 333 A great public bulletin-board in Pompeii. 1897 —— Following Equator iv. 75 To-day per the bulletin-board at the head of the companionway, it is September 10. 1949 Lisle (Ill.) Eagle 10 Mar. 5/1 With the new scroll placed on the bulletin board all may see who made the honor roll this time. 1979 Byte Dec. 103 Computerized bulletin board systems are multiplying like rabbits! These systems, which allow people to communicate with others via terminal modems and personal computer systems, are skyrocketing in popularity. 1984 Times 21 Sept. 12/4 He put out the challenge through the network of personal computer ‘bulletin boards’ which have sprung up in Britain.

Hence ˈbulletin v. trans. To make known by bulletin.

1838 Jerrold Men of Char., J. Pippins vii, Job again and again bulletined his convalescence. 1884 Reading (Pa.) Herald 3 Apr., Mr. L—— has made arrangements to have all‥championship games bulletined.