トレフォイルMeanings1noun, noun which may take the genitive case particle 'no'trefoil; three-leafed patternRefers to a decorative or symbolic three-lobed design, often used in architecture, heraldry, or graphic design.教きょう会かいの窓まどにトレフォイルの模も様ようが彫ほられている。A trefoil pattern is carved into the church window.このロゴはトレフォイルをモチーフにしている。This logo uses a trefoil motif.