The Collaborative International Dictionary of English v.0.48:

Tincture \Tinc"ture\, v. t. [imp. & p. p. Tinctured; p. pr. &
   vb. n. Tincturing.]
   1. To communicate a slight foreign color to; to tinge; to
      impregnate with some extraneous matter.
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            A little black paint will tincture and spoil twenty
            gay colors.                           --I. Watts.
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   2. To imbue the mind of; to communicate a portion of anything
      foreign to; to tinge.
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            The stain of habitual sin may thoroughly tincture
            all our soul.                         --Barrow.
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