according to law; lawful: the property's legitimate owner.

in accordance with established rules, principles, or
standards.

born in wedlock or of legally married parents: legitimate children.

in
accordance with the laws of reasoning; logically inferable; logical: a legitimate conclusion.

resting
on or ruling by the principle of hereditary right: a legitimate sovereign.

not
spurious or unjustified; genuine: It was a
legitimate complaint.

of the normal or regular
type or kind.