leaflet leaflessness • leafleteer · · · Info · Definitions · Synonyms · Characters · · leaflet · · Text Latin · · Script 7 · · Length Definitions · · · (noun) a thin triangular flap of a heart valve. Synonyms: cusp. · · Noun Definition 1 (noun) part of a compound leaf. · · Noun Definition 2 (noun) a small book usually having a paper cover. Synonyms: booklet, brochure, folder, pamphlet. · · Noun Definition 3 Synonyms · · · cusp · · Synonym 1 booklet · · Synonym 2 brochure · · Synonym 3 folder · · Synonym 4 pamphlet · · Synonym 5 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 f latin small letter f U+0066 l latin small letter l U+006C t latin small letter t U+0074