Definition of "become"

The humor of my proposition appealed more strongly to Miss Trevor than I had looked for, and from that time forward she became her old self again; for, even after she had conquered her love for the Celebrity, the mortification of having been jilted by him remained.

1897 December (indicated as 1898), Winston Churchill, chapter VIII, in The Celebrity: An Episode, New York, N.Y.: The Macmillan Company; London: Macmillan & Co., Ltd.

Then, as the Sunderland fans' cheers bellowed around the stadium, United's title bid was over when it became apparent City had pinched a last-gasp winner to seal their first title in 44 years.

2012 May 13, Alistair Magowan, “Sunderland 0-1 Man Utd”, in BBC Sport

Earless ghost swift moths become “invisible” to echolocating bats by forming mating clusters close (less than half a meter) above vegetation and effectively blending into the clutter of echoes that the bat receives from the leaves and stems around them.

2013 May-June, William E. Conner, “An Acoustic Arms Race”, in American Scientist, volume 101, number 3, pages 206–7

Ay, lord, she will become thy bed, I warrant,And bring thee forth brave brood.

1610–1611 (date written), William Shakespeare, “The Tempest”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act III, scene ii]

He was hatted, booted, overcoated, and umbrellaed, as became a person who was about to expose himself to the night and the storm on an errand of charity […]

1892, Ambrose Bierce, “The Applicant,” in The Collected Works of Ambrose Bierce, Volume II: In the Midst of Life (Tales of Soldiers and Civilians), New York: Gordian Press, 1966

His ordination […] enabled him to be independent of his parents, and to afford a manner of living which became his rank rather than his calling.

1930, Duff Cooper, Talleyrand, Folio Society, published 2010, page 7

& thenne the noble knyghte sire Launcelot departed with ryghte heuy chere sodenly / that none erthely creature wyste of hym / nor where he was become / but sir Bors(please add an English translation of this quotation)

1485, Sir Thomas Malory, chapter II, in Le Morte Darthur, book XVIII

But, madam, where is Warwick then become?

c. 1591–1592 (date written), William Shakespeare, “The Third Part of Henry the Sixt, […]”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act IV, scene iv]