uncontaminate adjective 1verb 1forms 4 adjective1 •(no longer used) Uncontaminated.Disease / Is not: the pure and uncontam'nate blood / Holds its due course, nor fears the frost of age. — 1785 verb1 •Synonym of decontaminate. formsuncontaminating · uncontaminates · more uncontaminate · most uncontaminate