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lacking
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/ˈlækɪŋ/- if something important or useful is lacking, it does not exist or is not availablesadly/distinctly/noticeably lacking (=completely lacking):
Concern for passenger safety has, up till now, been sadly lacking.
lacking in:She seems to be totally lacking in common sense.
be found lacking (=be unable to do what is necessary or expected):If someone needed first aid, would you be found lacking?
This is the British English definition of lacking. View American English definition of lacking.
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