Portentous (7)
'portentous' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for ominous that I've seen before include "Boding ill" , "Boding badly, menacing" , "Foreboding, menacing" , "Threatening, looks bad" , "Portending something bad" .)
'portentous' is the definition.
(I know that portentous can be written as fateful)
This is all the clue.
(Other definitions for fateful that I've seen before include "Ominous" , "Prophetic - portentous" , "Dire in its implications" , "critical" , "Portentous; bringing death" .)