adjective
1.
about to take place
their departure is imminent
Synonyms: impending, proximate
Related Word: approaching, coming, nearing, upcoming; brewing, gathering; pending; likely, possible, probable; ineluctable, inescapable, inevasible, inevitable, unavoidable, unescapable
Idioms: in prospect, in store, in the cards, in the offing, in the wind, in view
Contrasted words: distant, far-off, remote
2.
menacingly near
a thunderstorm was imminent
Synonyms: lowering ( or louring), lowery ( or loury), menacing, overhanging, threatening
Related Word: alarming, ominous, sinister; brewing, gathering; minatory