1. plants with three-leaflet compound leaves, especially clover
Usage: botanical
2. decorative designs or architectural ornaments having three lobes or leaves
Usage: architecture; decorative arts

Examples

• The meadow was covered with white and red trefoils.
• She collected four-leaf clovers among the common trefoils.
• The Gothic window featured beautiful stone trefoils.
• Trefoils are common motifs in medieval church architecture.
• The garden was planted with various trefoils and grasses.
• Ancient Celtic designs often incorporated trefoil patterns.
• The herbalist gathered trefoils for their medicinal properties.