a·ber·rant /ˈæbərənt, əˈberənt/ adjectiveadj formal NORMALnot usual or normal 异常的,反常的;脱离常规的 SYN abnormal aberrant• So-called aberrant behavior, in particular lesbian and homosexual behavior, was shown to have a natural precedent and a genetic basis.• aberrant behavior• You figure you've got a handle on all but the most aberrant human behaviour.• Now, this tree is aberrant in that it has two trunks.• The younger the age-group among the children found attractive, the more aberrant the impulse must be regarded.