1An arrangement according to which a person or company is obliged to deal only with a specific company.
- ‘For example, it's possible to find a two-year fixed rate (with no lock-in after the two years is up) for as little as 4.15% a year.’
2A protest demonstration in which a group locks itself within an office or factory.
- ‘Many others are picketing the council in support of the lock-in.’
- ‘The workers began a strike and held a lock-in, after refusing to allow 10 factory managers to leave.’