imminent

Definitions:

Impending; threatening; close at hand.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (adjective) (adj.) (adjective)
Impending; threatening; at hand.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (adjective) (adj.) (adjective)
Threatening; impending; close at hand.
- The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894. (adjective) (adj.) (adjective)
IMMINENTLY.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (adverb) (adv.) (adverb)
IMMINENCE.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (noun) (n.) (noun)
Threatening or about to fall or occur immediately.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (adjective) (adj.) (adjective)
Near at hand: threatening: impending.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (adjective) (adj.) (adjective)

Usage examples:

Such occasions as this test the discipline of a corps in a high degree, the more so when, as in the present instance, the danger of an explosion from the proximity of the flames to the magazine was imminent
- The History of the First West India Regiment by A. B. Ellis
Jack shook him with so emphatic a movement of disgust that Stephen was in imminent danger of making a further acquaintance with the lawn.
- Only One Love, or Who Was the Heir by Charles Garvice
The danger to my unfortunate music is the more imminent insomuch as there are no more singing schools in Italy.
- The Great Musicians: Rossini and His School by Henry Sutherland Edwards