This week may also be a defining moment in a political sense.
The past 10 days have been a watershed, a defining moment for the peace process.
As was mentioned earlier, each of us, especially as politicians, can talk a defining moment into a crisis.
It was apparent that the protest movement had been a defining moment in their lives.
It was a defining moment.
The loss of his son was a crushing blow and the defining moment of his life.
The middle colonial period was therefore a defining moment with respect to both the collection of data and the production of policy proposals.
Despite the caesura of 1989, 1945 still remains the defining moment for the present.