Then, the paleness of her face — its haggard aspect having vanished as she recovered flesh — and the peculiar expression arising from her mental state, though painfully suggestive of their causes, added to the touching interest which she awakened; and — invariably to me, I know, and to any person who saw her, I should think — refuted more tangible proofs of convalescence, and stamped her as one doomed to decay.
There are no more uses of "tangible" in the book.
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They set tangible goals.
The performance goal should be expressed as a tangible, measurable objective, against which actual achievement can be compared.