1. (

• improper ,
• unconventional ,
• unlawful

) not conforming to legality, moral law, or social convention; "an unconventional marriage"; "improper banking practices" ;

2. (

• unlawful

) contrary to or prohibited by or defiant of law; "unlawful measures"; "unlawful money"; "unlawful hunters" ;

3. (

• unlawful

) not morally right or permissible; "unlawful love" ;

4. (

• unlawful ,
• wrongful

) having no legally established claim; "the wrongful heir to the throne" ;

5. (

• illegitimate ,
• illicit ,
• outlaw ,
• outlawed ,
• unlawful

) contrary to or forbidden by law; "an illegitimate seizure of power"; "illicit trade"; "an outlaw strike"; "unlawful measures" ;