D defs.my
Entry 2 senses Webster, 1913

Insight

/ĭn'sīt/ · In·sight · IPA /ˈɪnsaɪ̯t/
01 n. A sight or view of the interior of anything; a deep inspection or view; introspection; -- frequently used with into.
  1. 1.
    A sight or view of the interior of anything; a deep inspection or view; introspection; -- frequently used with into.
    “He had an insight into almost all the secrets of state.” — Jortin.
  2. 2.
    Power of acute observation and deduction; penetration; discernment; perception.
    “Quickest insight In all things that to greatest actions lead.” Milton.