Definition of "abroach"

on the crosse a pike / Did set again abroach

1633, George Herbert, The Agonie

Jupiter, in the beginning of his reign, finding the world much more innocent than it is in this iron age, poured very plentifully out of the tun that stood at his right hand; but as mankind degenerated, and became unworthy of his blessings, he set abroach the other vessel, that filled the world with pain and poverty […]

1709, Joseph Addison, The Tatler, No. 146, 16 March, 1709, Glasgow: Robert Urie, 1754, p. 115

[…] hogsheads of ale were set abroach, to be drained at the freedom of all comers.

1820, Walter Scott, chapter 11, in Ivanhoe‎, volume 3, Edinburgh: Archibald Constable, page 285

I doe the wrong, and first began to braule / The secret mischiefes that I set abroach, / I lay vnto the grieuous charge of others: […]I do the wrong, and am the first to begin to quarrel. / The secret mischiefs that I set afoot, / I blame on others: […]

c. 1593 (date written), [William Shakespeare], The Tragedy of King Richard the Third. […] (First Quarto), London: […] Valentine Sims [and Peter Short] for Andrew Wise, […], published 1597, [Act I, scene iii]

When a person of high rank is destined for the victim, an emissary is dispatched to set the story abroach at some obscure coffee-house in the city, whence it speedily marches to its head quarters near the court:

1761, George Colman, The Genius, No. 6, 20 August, 1761, in Prose on Several Occasions, London: T. Cadel, 1787, Volume 1, p. 64