The phrase "a definite shift in" is correct and usable in written English.
It can be used to describe a clear or noticeable change in a particular situation, trend, or perspective.
Example: "There has been a definite shift in public opinion regarding climate change over the past decade."
Alternatives: "a clear change in" or "a noticeable transition in".
What I also see is a definite shift in society's attitude and a change in health and social work practice.
The revelation of the guests for the latest runs of two celebrity talent contests suggest a definite shift in personnel.
Over the past few years there has been a definite shift in awareness concerning the infinite challenges still facing women at every level.
Almost every film I've ever watched has changed my life, but this is the one that provoked a definite shift in me.
I could see there was a definite shift in the way young people were behaving, and the attitudes towards older people.
He is describing the Scandinavian model, and its introduction in the UK would mark a definite shift in the relationship between boards and shareholders.
There has been a definite shift towards female writers in the genre, which is likely to snowball in 2015, agreed Kate McHale, science fiction buyer for Waterstones.
"There was a definite shift here, with more Asians and Europeans bidding, although in New York we saw more participation from Russia," he said.
There is a definite shift between how charities should view fundraising over Christmas and in January, and this needs to be reflected in the way they talk to their supporters and the general public.
"I have been participating in this aquarium for 20 years and there has been a definite shift," said Mark McKinnon, vice president for Public Strategies and a media adviser to both President George W. Bush and Senator John McCain.
David Kiernan, of the Wow House Company, says there has been "a definite shift" towards clean, modern lines.
