1. (a.) Deviating from ordinary forms or rules; irregular; anomalous; abnormal.

2. (n.) A word which is irregular or anomalous either in declension or conjugation, or which deviates from ordinary forms of inflection in words of a like kind; especially, a noun which is irregular in declension.

3. (n.) Any thing or person deviating from the common rule, or from common forms.

aberrative abnormal abominable abroad adrift all abroad all off all wrong amiss amorphous anomalistic anomalous askew astray at fault atrocious atypical awry beside the mark circuitous corrupt criminal deceptive defective delinquent delusive departing desultory deviant deviating deviational deviative deviatory devious different digressive discursive disgraceful disparate distorted divergent eccentric errant erratic erring erroneous evil exceptional excursive fallacious FALSE faultful faulty flawed formless hardly the thing heretical heteroclite heterodox heteromorphic ignominious illegal illogical illusory improper inappropriate incorrect indecorous indirect infamous irregular labyrinthine mazy meandering not done not right not the thing not true odd off off the track off-base off-color out out-of-line out-of-the-way peccant peculiar perverse perverted planetary preternatural rambling roving sacrilegious scandalous self-contradictory serpentine shameful shameless shapeless shifting sinful snaky strange stray straying subnormal swerving terrible turning twisting undirected undue unfactual unfit unfitting unlawful unnatural unorthodox unproved unrepresentative unrighteous unseemly unsuitable untrue untypical unusual vagrant veering wandering wicked wide winding wrong wrongful zigzag