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1. Not capable of being made consistent or harmonious
   "inconsistent accounts"
    
2. Not in agreement
   - discrepant
    
3. Displaying a lack of consistency
   "inconsistent statements cannot both be true at the same time"; "inconsistent with the roadmap"

See also: at odds, conflicting, contradictory, discrepant, incompatible, incongruous, irreconcilable, scratchy, self-contradictory, spotty, unconformable, uneven, unreconcilable, unreconciled, variable

Antonym: consistent

Encyclopedia: Inconsistent