Thus 'a man' is an ambiguous description, and 'the man with the iron mask' is a definite description.
A more comprehensive and definite description of true believers is not to be found in the whole Bible.
Each purchaser was to receive with his deed a definite description of his holding.
She could, however, give no definite description of the figure she had seen.
It is only in the staid reports of old navigation companies that we get any definite description of our old-time rivers.
Thus "a man" is an ambiguous description, and "the man with the iron mask" is a definite description.
The steam engine of Captain Savery, also an Englishman, is the first of which any definite description has been preserved.