• Webster's Revised Unabridged Dictionary
    • n Inbreaking A breaking in; inroad; invasion.
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Century Dictionary and Cyclopedia
    • n inbreaking The act of breaking in; incursion; invasion; inroad.
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In literature:

They can swim in smooth water, though they are, of course, ill able to contend with an inbreak of the sea.
"Graham's Magazine Vol XXXIII No. 5 November 1848" by Various