/ ˈɒmɪnəs; NAmE ˈɑːm-/ adjective
suggesting that sth bad is going to happen in the future
SYN foreboding :
There were ominous dark clouds gathering overhead.
She picked up the phone but there was an ominous silence at the other end.
► om·in·ous·ly adverb
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WORD ORIGIN
late 16th cent.: from Latin ominosus , from omen , omin- omen.