The phrase "a definite challenge" is correct and usable in written English.
It can be used to describe a specific and clear difficulty or obstacle that one is facing.
Example: "Completing the project within the tight deadline proved to be a definite challenge for the team."
Alternatives: "a clear challenge" or "a significant challenge".
"From a sales point of view, it was a definite challenge".
In the current market, staying in Manhattan for $200,000 or less would be a definite challenge.
That was the complaint of a writer identified as Robin Somma, who posted this comment on the News 12 Web site: "Long Island Avenue was a sheet of ice, Carll's Path was a sheet of ice, and a drive that would normally take about five minutes tops was a definite challenge today.
"Getting all of these folks together to make something happen has been a definite challenge".
"It's been a definite challenge trying to keep up with what everyone is doing, but it's just the nature of the work when in this field".
Such a mission is a definite challenge since planning regulation in this quintessential corporate complex is responsive and subordinate to marketplace dynamics.
Robbins eventually found a producer for "Home of the Brave," which was about anti-Semitism in the military -- a definite postwar challenge to Broadway fluff.
Further reflection, however, suggests a number of definite challenges for technology designed for helping learners develop into thinkers: Higher levels of agency for students (Scardamalia & Bereiter [1991]): turning over to the learners strategic cognitive activity normally confined to the teacher e.g., priority setting, evaluating progress, trouble-shooting, ensuring inclusiveness.
But there are definite challenges in forming such a widespread and open platform like Yourmagz.com.
"There are definite challenges for modern authors.
"Technology today presents definite challenges related to security and propriety," said Col. Thomas W. Collins, an Army spokesman.
