To improve by alteration, correction of error, or removal of defects; put into a better form or condition: reform the tax code. To abolish abuse or malpractice in: reform the government. To put an end to (an abuse or wrong). To induce or persuade (a person) to give up harmful or immoral practices; cause to adopt a better way of life. Chemistry To subject (hydrocarbons) to cracking. Action to improve or correct what is wrong or defective in something: health care reform. An instance of this; an improvement: reforms in education. Relating to or favoring reform: a reform candidate for mayor. Of or relating to Reform Judaism.