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Definition of Lacking
1. Adjective. Inadequate in amount or degree. "Tested and found wanting" 
2. Adjective. Nonexistent. "Her appetite was lacking"
Definition of Lacking
1. lack [v] - See also: lack
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1. Adjective. Inadequate in amount or degree. "Tested and found wanting" 
1. lack [v] - See also: lack