The phrase "a delineation" is correct and usable in written English.
It can be used when referring to a clear description or representation of something, often in a detailed or precise manner.
Example: "The report provides a delineation of the project's objectives and expected outcomes."
Alternatives: "a description" or "an outline".
It's a delineation of villainy that matches anything in Milton.
There must be a delineation between business junk e-mail and solicitations from purveyors of pornography and Viagra.
Here, only a delineation of the field of logic is given.
Ulrich Konrad calls these stockpiles of material "departure points" — "a delineation of intellectual places to which Mozart could return as necessary".
At most Premier League clubs there is a delineation between the scouting at first-team and youth levels but Southampton have adopted an holistic approach.
His epochal geologic map of England and Wales appeared in 1815 under the title A Delineation of the Strata of England and Wales, with Part of Scotland.
And it's true, of course, that we do make a delineation between the rights and responsibilities of children and adults, and even the right to have certain things forgotten.
There needs to be a delineation where we can say that no, this kind of premarital sex isn't bad: it's between two consenting adults, who are maybe in a loving relationship.
Ironically, they then have to agree on a delineation of a zone surrounding the area in dispute, which is then clearly marked, and sterilized of life and commerce.
This creation, beautifully color tinted and titled "A Delineation of the Strata of England and Wales With a Part of Scotland," was to bring Smith as much grief as glory.
A few years after modernism swept into Paris in 1965, a delineation described by fashion writers at the time as B.C. or A.C. (before Courrèges, after Courrèges), Balenciaga closed his doors.
