This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Against the law; illegal.

adj. Born out of wedlock.

adj. Grammar Not in correct usage.

adj. Incorrectly deduced; illogical.

adj. Biology Unacceptable as a scientific name because of contradiction to the international rules of nomenclature.

adj. Illegal; against the law.

adj. Born to unmarried parents.

adj. Illogical; incorrectly deduced.

adj. Not according to law; not regular or authorized; unlawful; improper.

adj. Unlawfully begotten; born out of wedlock; bastard.

adj. Not legitimately deduced or inferred; illogical.

adj. Not authorized by good usage; not genuine; spurious.

v. To render illegitimate; to declare or prove to be born out of wedlock; to bastardize; to illegitimatize.

Not legitimate.

Not logically inferred or deduced; not warranted; illogical: as, an illegitimate inference.

Unlawfully begotten; born out of wedlock; bastard: as, an illegitimate child. See legitimate.

In botany, produced by irregular or abnormal fertilization. See phrase below.

To render or prove illegitimate; attaint as having been born out of wedlock; bastardize.

n. An emigrant who has come of his own volition and has not had ‘legal reasons’ for his voyage. See legitimate, n., 2.

n. the illegitimate offspring of unmarried parents

adj. of marriages and offspring; not recognized as lawful

adj. contrary to or forbidden by law

"I do have to say I dislike the term illegitimate when talking about children."

adulterine    spurious    misbegot    left-handed    bastardly    base    fatherless    unlawful    wrongful    misbegotten   

legal    logical    legitimate   

progeny    issue    offspring   

illegitimate fertilization    illegitimate function   

illegitimated    illegitimating   

unlawful    improper    bastard    illogical    spurious    bastardize    illegitimatize   

long-lost    legitimate    unborn    illicit    illegal    rightful    fatherless    eleven-year-old    spurious    fraudulent