The phrase "ability to define the" is correct and usable in written English.
It can be used when discussing someone's capacity or skill to articulate or clarify a particular concept or term.
Example: "The researcher demonstrated an impressive ability to define the key terms used in her study, ensuring clarity for her audience."
Alternatives: "capacity to articulate the" or "skill to explain the".
They accuse each other of treason because no "wise men" can be found with the ability to define the proper use of American power.
Part of Mr. Perry's success has been his ability to define the race as a referendum on Mr. Obama and the national Democratic Party.
But a year into his presidency, Mr. Obama has lost control of his political narrative, his ability to define the story of his presidency on his own terms.
"It was about not having the ability to define the upper level of the market and making a proposal that we knew was going to be rejected because they might think the market will go higher.
The album also displayed the band's ability to define the preoccupations of post-punk youth - the NF are on the march, teddy boys and punks punch it out, "boot boys" lurk in the shadows, waiting to strike.
In fact, it has been Ms. Ambiga's ability to define the Bersih movement as a cause apart from partisan politics that has enabled her to unite Malaysians, said Mr. Suffian, of the Merdeka Center.
The powerful molecular analysis technologies now at our disposal and the increasingly sensitive and specific analysis platforms under development provide us with unprecedented abilities to define the molecular features of cells and tissues.
As such, the user lacks the ability to define on-the-fly the seed's location and/or span.
The methodological limitations almost certainly affected their ability to define accurately the strength of the relationship, however, and will continue to do so if implemented in future studies.
The emergence of SNP arrays offer the ability to define simultaneously the copy number changes and LOH events occurring in a tumor, at high resolution and throughout the genome.
What strikes me is the crows' ability to define, somehow, the limits of my perception.
