1. overbreak - Noun
2. overbreak - Verb
(intransitive) To cave in near the edge of an excavation.
(transitive, UK dialectal) To get over; recover from.
He was never able to overbreak his rheumatism.
overbreak (plural overbreaks)
(civil engineering, geology) Rock or earth excavated beyond the planned extent; caving in of material near the edge of an excavation.