The difference between Ill-defined and Indistinct
When used as adjectives, ill-defined means poorly defined, whereas indistinct means not clearly defined or not having a sharp outline.
check bellow for the other definitions of Ill-defined and Indistinct
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Ill-defined as an adjective:
Poorly defined; blurry, out of focus; lacking a clear boundary.
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Ill-defined as an adjective (mathematics):
Defined in an inconsistent way.
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Indistinct as an adjective (of an image etc):
not clearly defined or not having a sharp outline; faint or dim
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Indistinct as an adjective (of a thought, idea etc):
hazy or vague
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Indistinct as an adjective (of speech):
difficult to understand through being muffled or slurred