Meaning of exacting

Definition of exacting

(adj) having complicated nutritional requirements; especially growing only in special artificial cultures; "fastidious microorganisms"; "certain highly specialized xerophytes are extremely exacting in their requirements"
severe and unremitting in making demands; "an exacting instructor"; "a stern disciplinarian"; "strict standards"
requiring precise accuracy; "an exacting job"; "became more exigent over his pronunciation"

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