distinctness

1. The quality or state of being distinct; a separation or difference that prevents confusion of parts or things.

The soul's . . . distinctness from the body.

2. Nice discrimination; hence, clearness; precision; as, he stated his arguments with great distinctness.

Syn. -- Plainness; clearness; precision; perspicuity.

noun

The quality of being clear and easy to perceive or understand: clarity, clearness, limpidity, limpidness, lucidity, lucidness, pellucidity, pellucidness, perspicuity, perspicuousness, plainness. See clear/unclear.

The noun has 3 meanings:

Meaning #1: the quality of being sharp and clear
  Synonym: sharpness
  Antonym: indistinctness (meaning #1)

Meaning #2: the state of being several and distinct
  Synonyms: discreteness, separateness, severalty

Meaning #3: the quality of being not alike; being distinct or different from that otherwise experienced or known
  Synonyms: otherness, separateness