revivalist
Concise Oxford English Dictionary © 2008 Oxford University Press:
revivalism/rɪˈvʌɪvəlɪzəm/
▶noun
- 1 belief in or the promotion of a revival of religious fervour.
- 2 a tendency or desire to revive a former custom or practice.
– derivatives
revivalist noun & adjective,
revivalistic adjective.
revivalist noun & adjective,
revivalistic adjective.
'revivalist' also found in these Oxford entries:

