a ‧ ber ‧ rant /ˈæbərənt, əˈberənt/ BrE AmE adjective formal
[ Date: 1500-1600 ; Language: Latin ; Origin: present participle of aberrare , from ab- 'away' + errare 'to wander' ]
not usual or normal SYN abnormal :
aberrant behaviour
a ‧ ber ‧ rant /ˈæbərənt, əˈberənt/ BrE AmE adjective formal
[ Date: 1500-1600 ; Language: Latin ; Origin: present participle of aberrare , from ab- 'away' + errare 'to wander' ]
not usual or normal SYN abnormal :
aberrant behaviour
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012