turning point 
noun
A time at which a decisive change in a situation occurs, especially one with beneficial results: this could be the turning point in Nigel’s career...
- The turning points have been the result not of an accumulation of gradual changes in education or ‘enlightened’ official policy.
- All of the decisive turning points of German history were characterised by violent and usually bloody conflicts between the classes.
- Hardly any attention is given to the decisive turning points at which history might have taken a different path.
Synonyms
watershed, critical moment, decisive moment, crossroads, crisis, climacteric, moment of truth;
landmark
- organized labor
- organized labour
- organized religion
- organizer
- organless
- organ-like
- organ loft
- organ maker
- organ meat
- organ note
- organo-
- organochloride
- organochlorine
- organoclay
- organo-compound
- organ of Corti
- organ of Ribaga
- organogenesis
- organogenetic
- organogenic
- organogenous
- organogram
- organographic
- organographical
- organographist