Definition of "instinctually" [instinctually]

• In an instinctual way. (adverb)

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• "‘Eye witnesses’ during a traumatic events are not wholly reliable, because the thinking portions of the brain instinctually turn off and revert to ‘reptilian flight or flight adenaline processes’."
• "This is something that happens kind of instinctually, just the way I decide to shoot things."
• "On The Road this year - added that she is "not good" at planning her career and prefers to choose projects "instinctually". two movies, with the first part arriving in cinemas November 2011."