ETYM French réformer, Latin reformare; pref. re- re- + formare to form, from forma form. Related to Form.
1. To change for the better; SYN. straighten out.
2. To make reforms in; change for the better.
3. To subject to spiritual regeneration; SYN. regenerate.
4. To produce by cracking, of oil or gas.
5. To break up the molecules (of oil or gas).