defoliate /diːˈfəʊliː(j)eɪt/adjective 1verb 1forms 5 adjective1 •Deprived of leaves; defoliated. verb1 •To remove foliage from (one or more plants), most often with a chemical agent.Agent Orange was used to defoliate jungle vegetation. formsdefoliated · defoliating · defoliates · more defoliate · most defoliate