Drawing together the tissues; binding; contracting; -- opposed to laxative; as, astringent medicines; a butter and astringent taste; astringent fruit.
If a wine makes your mouth pucker up, it probably has too much tannin in it. If it's a young wine, leave it to mature.
A reference to wines with a high tannic (usually green or unripe tannin) content, resulting in a drying mouthfeel. Typically a negative description mostly used for red wines.