broadleaf adjective 2noun 2forms 2 adjective2 •Pertaining to trees with relatively broad, flat leaves as opposed to needles, or woodlands made up of such trees.Urban has spent close to a decade slogging around in the ponds of Connecticut’s broadleaf forests examining the intricacies of salamander populations. — 2015 •Used in the name of a plant or tree: having especially broad leaves. noun2 •A type of tobacco having broad leaves, used for making cigars. •A tree (Terminalia latifolia, now Terminalia catappa) of Jamaica. formsbroadleafs · broadleaves