Definition of "trigger finger" []

• A finger used in pulling the trigger of a firearm (noun)
• The forefinger (noun)
• Difficulty encountered in finger flexion or extension caused by the narrowing of the sheath that surrounds that finger's tendon (noun)

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• "Nick went through the door hard, his Glock in a steady two-hand grip, trigger finger indexed above the trigger guard, a SureFire light mounted on rails beneath the barrel burning a hole in the smoky turmoil conjured by the flashbangs."