/ ˌɪləˈdʒɪtəmət; NAmE / adjective
1.
born to parents who are not married to each other
2.
not allowed by a particular set of rules or by law
SYN unauthorized :
illegitimate use of company property
OPP legitimate
► il·legit·im·acy / ˌɪləˈdʒɪtəməsi; NAmE / noun [ U ]
► il·legit·im·ate·ly adverb
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WORD ORIGIN
mid 16th cent.: from late Latin illegitimus (from in- not + legitimus lawful), suggested by legitimate .