leaflet /ˈliːflɪt/noun 4verb 2forms 5 noun4 •A small sheet of paper containing information, used for dissemination of said information, often an advertisement.A leaflet had been left under the car's windshield wiper. •One of the components of a compound leaf. •A small plant leaf.The new leaflets at the end of the branch were a lighter shade of green than the mature leaves. •A flap of a valve of a heart or blood vessel.the flutter of the anterior mitral leaflet is best delineated — 1985 verb2 •To distribute leaflets to.A sidewalk preacher gave an impassioned sermon while an assistant leafleted those who stayed to listen. •To distribute leaflets.During the summer, Peter earned some extra cash by leafleting for a local pizza delivery restaurant. formsleafleted · leafletted · leafleting · leafletting · leaflets