Definition of "calamity"

Romeo come forth / Come forth thou fearfull man, / Affliction is enamor’d of thy parts: / And thou art wedded to calamitie.

c. 1591–1595 (date written), William Shakespeare, “The Tragedie of Romeo and Ivliet”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act III, scene iii], page 67, column 2

Yet, at that moment, she felt as if the acquisition of these gems were a calamity. Their possession involved separation from her uncle, from every relic of home affections, and from all that yet lingered with her of her childhood.

1837, L[etitia] E[lizabeth] L[andon], “Age and Youth”, in Ethel Churchill: Or, The Two Brides. […], volume I, London: Henry Colburn, […], page 15

And the village was deserted, the huts gaped black, rotting, all askew within the fallen enclosures. A calamity had come to it, sure enough.

1899 February, Joseph Conrad, “The Heart of Darkness”, in Blackwood’s Edinburgh Magazine, volume CLXV, number M, New York, N.Y.: The Leonard Scott Publishing Company, […], part I, page 199

They were behind twice, first in the 11th minute when James Morrison scored a goal that was a personal calamity for Hart, and then four minutes into the second half when Kenny Miller eluded Gary Cahill to score with a splendid left-foot drive.

2013 August 14, Daniel Taylor, The Guardian‎