Open English Wordnet
Nouns
(n)exigencya pressing or urgent situation“the health-care exigency” (n)emergency, exigency, pincha sudden unforeseen crisis (usually involving danger) that requires immediate action“he never knew what to do in an emergency” (n)exigencythat which is required in a particular situation — usually used in plural.“The trench maps used in the Great War resulted from the exigencies of war.”