Definition of "Legitimate" :

verb: make (an illegitimate child) legitimate; declare the legitimacy of (someone)

verb: show or affirm to be just and legitimate

verb: make legal

adjective: authorized, sanctioned by, or in accordance with law

"A legitimate government."

adjective: of marriages and offspring; recognized as lawful

adjective: in accordance with recognized or accepted standards or principles

"Legitimate advertising practices."

adjective: based on known statements or events or conditions