Having the nature or quality of a portent; ominous, threatening.

Of a sign, token, etc.: Of ill omen, ominous; hence, strongly indicative (of something unfavourable).

Of an omen or sign: portending or suggestive of misfortune or disaster; inauspicious, portentous.

Ominous, inauspicious; indicative or suggestive of future misfortune. Now somewhat rare.

Foreboding or indicating mischief; ominous.

Having the quality or nature of a portent; ominous, prophetic; = portentous, adj. 1.

Not auspicious, not of good omen; of unfavourable presage, foreboding evil; ill-omened, unlucky, unfortunate.

That has a presentiment of something untoward or unpleasant; characterized or qualified by anxiety or foreboding.

Of evil omen.

That bodes or portends evil; of evil omen.

= inauspicious, adj.

portentous.

= ill-boding, adj.

Having or attended by bad omens; ill-starred; inauspicious.