aberrant /əˈbɛɹ.ənt/adjective 3noun 2forms 3 adjective3 •Differing from the norm. •Deviating from the ordinary or natural type; exceptional; abnormal.The more aberrant any form is, the greater must have been the number of connecting forms which, on my theory, have been exterminated. — 1859 •(figurative) Straying from the right way; deviating from morality or truth. noun2 •A person or object that deviates from the rest of a group. •A group, individual, or structure that deviates from the usual or natural type, especially with an atypical chromosome number.Also I think other birders realise you are struggling a bit when you start talking about aberrants[.] — 1980 formsaberrants · more aberrant · most aberrant