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English
Etymology
From ill + defined.
Adjective
ill-defined (comparative more ill-defined, superlative most ill-defined)
- Poorly defined; blurry, out of focus; lacking a clear boundary.
1837, L E L, Ethel Churchill: Or, The Two Brides. In Three Volumes.">…], volume III, London: Henry Colburn, , →OCLC, pages 45–46:An ill-defined dislike, a little like jealousy, arose in Henrietta's mind; a little, however, mitigated by observing that the gentleman instantly caught sight of herself; and that, when not absolutely forced to look at his companion, he looked towards her.
- (mathematics) Defined in an inconsistent way.
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