tri-weeklyadj.adv.n.
/trʌɪˈwiːkli/ A. adj.
(a) Occurring every three weeks, or lasting for three weeks. (b) Usually, occurring, appearing, or operating three times every week. Originally U.S.
ΘΚΠ
the world > time > period > a week > [adjective] > specific number of times a week
seven dayseOE
a-weekOE
weekly1403
hebdomadally1816
tri-weekly1832
week-long1847
the world > time > period > a week > [adjective] > occurring a specific number of times a week
weekly1489
hebdomadary1625
hebdomaticala1659
hebdomadal1711
septimanal1786
tri-weekly1832
semi-weekly1833
bi-weekly1885
the world > time > period > a week > [adjective] > occurring every specific number of weeks
fortnight1549
fortnightly1800
tri-weekly1832
society > communication > journalism > journal > periodical > [noun] > by frequency of publication
quarterly1818
trimestrial1824
anniversary1827
monthly1830
tri-weekly1832
hebdomadal1835
fortnightly1865
three-monthly1886
bi-weekly1890
seasonal1895
bi-monthly1926
1832 W. T. Barry 17 May in Amer. State Papers (1834) XV. 348 The line of stages connecting Philadelphia and Delaware with the Eastern shore of Maryland and Virginia, has been increased from a bi-weekly, to a tri-weekly line.
1843 Penny Cycl. XXVI. 14/2 Semi- or tri-weekly newspapers.
1895 R. H. Sherard in Bookman Oct. 16/2 The tri-weekly supplement of La Lanterne.
1903 Daily Chron. 15 Jan. The tri-weekly expresses running across Siberia.
B. adv.
(a) Every three weeks. (b) Three times a week.
ΘΚΠ
the world > time > period > a week > [adverb] > every specific number of weeks
week and week about1796
fortnightly1820
tri-weekly1837
1837 J. M. Peck Gazetteer Illinois (ed. 2) iii. 180 The mail..arrives here tri-weekly.
1857 Ann. Reps. U.S. P.M.G. 980 Proposals to carry the mails tri-weekly in steamers between Cedar Key and New Orleans.
1884 G. P. Keese in Harper's Mag. July 300/1 A line of..coaches has been established, leaving tri-weekly.
1901 Daily News 12 Jan. 5/3 In consequence of military restrictions..the advertisement sheet which has been appearing every week will be issued tri-weekly.
C. n.
A tri-weekly journal. Originally U.S.
ΚΠ
1851 C. Cist Sketches & Statistics Cincinnati 74 These are all dailies, tri-weeklies, and weekly reissues of dailies.
1884 U.S. Census VIII. 111 Three months only the Spy ran as a tri-weekly, and but three months longer as a semi-weekly.
1978 D. Daiches Edinburgh vi. 110 The Caledonian Mercury (a tri-weekly founded in 1720).
This entry has not yet been fully updated (first published 1915; most recently modified version published online December 2019).
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adj.adv.n.1832