...they looked seldom at it, for it was ominous and dreary even in the light of morning.
Great floods and rains had swollen the waters that flowed east; and there had been an earthquake or two (which some were inclined to attribute to the dragon-alluding to him chiefly with a curse and an ominous nod in the direction of the Mountain).
Nothing moved in the waste, save the vapour and the water, and every now and again a black and ominous crow.
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.