The phrase "a barely defined" is correct and usable in written English.
It can be used to describe something that lacks clear boundaries or specifications.
Example: "The project had a barely defined scope, leading to confusion among team members about their responsibilities."
Alternatives: "vaguely defined" or "poorly defined".
A risky move at a time when the marketplace for upstarts and funding was barely defined in the U.S., let alone overseas.
At Helmut Lang, Hannah Murray for NARS focused on creamy skin (tinted moisturizer and a sweep of Orgasm blush) with bold brows on the brunettes and barely defined arches on blondes.
The character is so underwritten in Stephen Sommers and David Loughery's screenplay that Huck is barely defined.
In northwestern and central western Iran, local cultures, as yet barely defined beyond their ceramic parameters, developed in relative isolation from events elsewhere.
In fact, we are barely defined by the role of wife at all.
Donald Trump, the GOP White House nominee, follows the party line on the Affordable Care Act, which is that it should be repealed and replaced with some other set of reforms that he has barely defined.
Metagenomics studies have barely defined the rules to normalize across samples and within the same sample.
The role of costimulatory molecules in CE has been barely defined, but hydatid fluid antigen seems to induce diminished expression of CD28 in T cell cultures [ 35].
What follows is usually a delightful exchange – which you could barely define as a "conversation" – involving both parties bouncing classic quotes from the film off each other.
Because if I don't, if I let myself say that the war was a mistake, that my husband's death served no purpose, that men who had no real concept of combat sent soldiers to fight and die for a cause they could barely define, then I would carry nothing but hate in my heart.
