1. a sudden burst in the tyre of a moving vehicle ⇒ A lorry travelling south had a blow-out and crashed.
2. the sudden melting of an electrical fuse
3. the uncontrolled escape of oil or gas from an oil or gas well
4. the failure of a jet engine, esp when in flight
5. British informal a large filling meal ⇒ Once in a while we had a major blowout.
6. Australian a sudden large-scale increase in something ⇒ a blowout in surgery costs, ⇒ a blow-out in the balance of payments
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