Legal and lawful both mean 'allowed by law'. Lawful is a formal word.
Legitimate means 'correct or acceptable according to a law or rule'.
Legitimate can also mean 'justifiable under the circumstances'.
If someone is legitimate, their parents were married at the time they were born.
Legal also means 'relating to the law'. You cannot use lawful or legitimate with this meaning.
You use law, not 'legal', in front of a noun when you are talking about someone or something connected with the study of law.
Law also appears in the names of some places and institutions connected with the law.
| Imperative |
|---|
| legitimate |
| legitimate |
| Verb | 1. | legitimate - make legal; "Marijuana should be legalized" decriminalise, decriminalize, legalise, legalize, legitimatise, legitimatize, legitimise, legitimize countenance, permit, allow, let - consent to, give permission; "She permitted her son to visit her estranged husband"; "I won't let the police search her basement"; "I cannot allow you to see your exam" |
| 2. | legitimate - show or affirm to be just and legitimate | |
| 3. | legitimate - make (an illegitimate child) legitimate; declare the legitimacy of (someone); "They legitimized their natural child" | |
| Adj. | 1. | legitimate - of marriages and offspring; recognized as lawful authorised, authorized - endowed with authority legal - established by or founded upon law or official or accepted rules valid - well grounded in logic or truth or having legal force; "a valid inference"; "a valid argument"; "a valid contract" illegitimate - of marriages and offspring; not recognized as lawful |
| 2. | legitimate - based on known statements or events or conditions; "rain was a logical expectation, given the time of year" valid - well grounded in logic or truth or having legal force; "a valid inference"; "a valid argument"; "a valid contract" | |
| 3. | legitimate - in accordance with recognized or accepted standards or principles; "legitimate advertising practices" constituted, established - brought about or set up or accepted; especially long established; "the established social order"; "distrust the constituted authority"; "a team established as a member of a major league"; "enjoyed his prestige as an established writer"; "an established precedent"; "the established Church" | |
| 4. | legitimate - authorized, sanctioned by, or in accordance with law; "a legitimate government" legal - established by or founded upon law or official or accepted rules |