demarcation

noun

de·​mar·​ca·​tion ˌdē-ˌmär-ˈkā-shən 

plural demarcations

1

: the marking of the limits or boundaries of something : the act, process, or result of demarcating something

the demarcation of property lines

2

: something that marks or constitutes a boundary

a demarcation line

: a marked or perceived distinction between one area, category, etc., and another

The ability to test a theory against physical evidence … has provided a useful demarcation between science and pseudoscience.

—Norriss S. Hetherington

Certainly no clear line of demarcation has as yet been drawn between species and sub-species—that is, the forms which in the opinion of some naturalists come very near to, but do not quite arrive at the rank of species.

—Charles Darwin

There has been much chatter in recent seasons about the great gender crossover, that deliberate erosion on the runways of a once-rigid demarcation between conventionally feminine and masculine clothes.

—Elizabeth Paton

… the continued presence in the modern imagination of a sharp demarcation between public and private space.

—AAG Abstracts

Synonyms

• discreteness
• discrimination
• distinction
• separation

Examples of demarcation in a Sentence

the lines of demarcation between art and entertainment are often blurry

Recent Examples on the Web

In hindsight, the demarcation line couldn’t have been more clear. —Jack Harris, Los Angeles Times, 12 May 2025

So, instead of work-life balance, consider the concept of work-life boundary that makes a case for clear demarcation between work and non-work lives. —Anjali Chaudhry, Forbes.com, 25 Apr. 2025

Flying alongside five other women, including pop star Katy Perry and TV morning show host Gayle King, Bowe soared past the Karman line, the boundary at 62 miles (100 kilometers) that is internationally recognized as the demarcation between Earth's atmosphere and outer space. —Robert Z. Pearlman, Space.com, 14 Apr. 2025

The retired lieutenant general's proposal, which was outlined in British newspaper The Times, is the first by a senior U.S. official that uses the Dnieper River as a line of demarcation in postwar Ukraine, although Kellogg did not advocate ceding to Moscow any further territory east of the river. —David Faris, MSNBC Newsweek, 12 Apr. 2025

Word History

First Known Use

1728, in the meaning defined at sense 1

Rhymes for demarcation

• abdication
• aberration
• abjuration
• abnegation
• abrogation
• acceptation
• acclamation
• acclimation
• accusation
• activation
• actuation
• acylation