- 1[intransitive] (+ adv./prep.) to appear as a large shape that is not clear, especially in a frightening or threatening way A dark shape loomed up ahead of us.
- 2[intransitive] to appear important or threatening and likely to happen soon There was a crisis looming. Idioms
NAmE//lum//Verb Forms present simple I / you / we / they loom
he / she / it looms
past simple loomed
-ing form looming
to be worrying or frightening and seem hard to avoid The prospect of war loomed large.
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