Having only one (single) culture; of or relating to a monoculture(adjective)
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Use "monocultural" in a sentence
"The greens are now railing against -- these are called monocultural trees which are exactly what you in today ` s culture would expect."
"Instead, segregation has continued despite the fact that some of Oldham's most monocultural schools have been closed and merged since the riots, while others have been moved to different areas to seek a mixed intake."
"I need to not let my worlds be monoracial, monocultural -- even when their models (Hollow-Boned Desire, '50s-ish America) are deeply segregated and problematic."