air gap

noun

Definition of air gap

  1. 1 :  an air-filled gap in a magnetic or electric circuit (as the space between the field-magnet poles and the armature in a dynamo or motor)

  2. 2 :  wind gap

  3. 3 :  the vertical distance between the point where water enters a plumbing fixture (as a tub) and the level at which it would overflow

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First Known Use of air gap

1878


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