From Longman Dictionary of Contemporary Englishbe bound tobe bound toCERTAINLY/DEFINITELYto be very likely to do or feel a particular thing Don’t lie to her. She’s bound to find out.it is bound to be (=used to say that something should have been expected) ‘It’s hot!’ ‘Well, it was bound to be – I just took it out of the oven.’ When you are dealing with so many patients, mistakes are bound to happen.RegisterBound to is used mainly in spoken English. In written English, people usually use certain to, it is inevitable that instead: Mistakes are bound to happen. → It is inevitable that mistakes will happen. → bound
Examples from the Corpus
bound to happen• But you, well, I guess it was bound to happen.• When andouille and chorizo stand side by side on the same menu, something intriguing is bound to happen.• With two conflicting styles of dancing taking place simultaneously on sometimes crowded dance floors, collisions are bound to happen.• These cross-temporal flashes suggest, perhaps, that some things are bound to happen regardless of what people do or choose.• Mistakes are bound to happen sometimes.• Something momentous was bound to happen soon.• But I do not think that what is possible is bound to happen, sooner or later.• However, I suppose it was bound to happen sooner or later. 