noun astringency.
2. astriction ·noun constipation.
3. astriction ·noun the act of binding; restriction; also, obligation.
4. astriction ·noun a contraction of parts by applications; the action of an astringent substance on the animal economy.
5. astriction ·noun an obligation to have the grain growing on certain lands ground at a certain mill, the owner paying a toll.