Tennessee Code Title 67. Taxes and Licenses § 67-1-1001

(1) “Back assessment” means the assessment of property, including land or improvements not identified or included in the valuation of the property, that has been omitted from or totally escaped taxation; and

(2) “Reassessment” means the assessment of property that has been assessed at less than its actual cash value by reason of connivance, fraud, deception, misrepresentation, misstatement, or omission of the property owner or the owner's agent.