- any of various plants or shrubs of the genus Hypericum, having yellow flowers and transparently dotted leaves.
noun usually abbreviated to: St John’s wort
- any of numerous shrubs or herbaceous plants of the temperate genus Hypericum, such as H. perforatum, having yellow flowers and glandular leaves: family Hypericaceae
- a preparation of this plant often used to treat mild depressionSee also rose of Sharon (def. 1), tutsan