Meaning of REGRESS in English

REGRESS

re ‧ gress /rɪˈɡres/ BrE AmE verb [intransitive]

[ Date: 1500-1600 ; Language: Latin ; Origin: past participle of regredi 'to go back' ]

technical to go back to an earlier and worse condition, or to a less developed way of behaving OPP progress :

The patient had regressed to a state of childish dependency.

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.