When one of them is born, it is reckoned ominous, and their birth is recorded very particularly so that you may know their age by consulting the register, which, however, has not been kept above a thousand years past, or at least has been destroyed by time or public disturbances.
There are no more uses of "ominous" in the book.
Show samples from other sources
I’m beginning to hear ominous rumblings of discontent.
With the clouds looking so ominous, I’m afraid there will be a bad storm.