Collins COBUILD Advanced Learner's English Dictionary - disastrous

1. A disastrous event has extremely bad consequences and effects. ...the recent, disastrous earthquake... = catastrophic ADJ • disastrously The vegetable harvest is disastrously behind schedule... ADV: ADV adj/prep, ADV with v 2. If you describe something as disastrous, you mean that it was very unsuccessful. ...their disastrous performance in the general election of 1906. ADJ • disastrously ...the company’s disastrously timed venture into property development. ADV: ADV adj, ADV with v