Adjective illegitimate has 2 senses
- illegitimate, illicit, outlaw, outlawed, unlawful - contrary to or forbidden by law; "an illegitimate seizure of power"; "illicit trade"; "an outlaw strike"; "unlawful measures"
Antonym: legal (indirect, via illegal)
- illegitimate - of marriages and offspring; not recognized as lawful
Antonyms: legitimate, lawfully-begotten, morganatic, left-handed, true, lawful, rightful
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Noun illegitimate has 1 sense
- bastard, by-blow, love child, illegitimate child, illegitimate, whoreson - the illegitimate offspring of unmarried parents
--1 is a kind of offspring, progeny, issue
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