non·bind·ing 
/nɑnˈbaɪndɪŋ/ adjective
/nɑnˈbaɪndɪŋ/ adjective law : not officially requiring that you do something : not able to be enforced by law
▪ We entered/signed a nonbinding agreement to buy our competitor. [=we agreed to buy our competitor, but we did not make a legal and official promise to buy it]
▪ We entered/signed a nonbinding agreement to buy our competitor. [=we agreed to buy our competitor, but we did not make a legal and official promise to buy it]
