Main entry: lawful
Definition: conformable to or allowed by law
Usage: lawful methods of dissent
Antonyms: unlawful
Definition: contrary to or prohibited by or defiant of law
Main entry: rule-governed, lawful
Definition: according to custom or rule or natural law
Antonyms: irregular
Definition: contrary to rule or accepted order or general practice
Antonyms: irregular
Definition: (of solids) not having clear dimensions that can be measured; volume must be determined with the principle of liquid displacement
Antonyms: irregular
Definition: (used of the military) not belonging to or engaged in by regular army forces
Main entry: lawful, true, rightful
Definition: having a legally established claim
Usage: the legitimate heir; the true and lawful king
Antonyms: illegitimate
Definition: of marriages and offspring; not recognized as lawful
Main entry: legitimate, licit, lawful
Definition: authorized, sanctioned by, or in accordance with law
Usage: a legitimate government
Antonyms: illegal
Definition: prohibited by law or by official or accepted rules