[in-too-ish-uh
n, -tyoo-] 
| 1. | direct perception of truth, fact, etc., independent of any reasoning process; immediate apprehension. |
| 2. | a fact, truth, etc., perceived in this way. |
| 3. | a keen and quick insight. |
| 4. | the quality or ability of having such direct perception or quick insight. |
| 5. | Philosophy.
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| 6. | Linguistics. the ability of the native speaker to make linguistic judgments, as of the grammaticality, ambiguity, equivalence, or nonequivalence of sentences, deriving from the speaker's native-language competence. |