/ˈɑːmɪnəs/

om·in·ous

BrE /ˈɒmɪnəs/

NAmE /ˈɑːmɪnəs/

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.

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om·in·ous·ly

BrE /ˈɒmɪnəsli/

NAmE /ˈɑːmɪnəsli/