Definition of "overflowing"

[T]hough he had, as it were, from the overflowings of his heart, given Sophia as a toast among the officers, where he thought it was impossible she should be known; yet, even there, the reader may remember how difficultly he was prevailed upon to mention her surname.

1749, Henry Fielding, The History of Tom Jones, a Foundling

the great overflowings and recedings of the waters

1829, Josiah Conder, The Modern Traveler, page 205