insular

adjective

in·​su·​lar ˈin(t)-su̇-lər 

-syu̇-,

ˈin-shə-lər

1

: characteristic of an isolated people

especially : being, having, or reflecting a narrow provincial viewpoint

2

a

: of, relating to, or constituting an island

b

: dwelling or situated on an island

insular residents

3

: of or relating to an island of cells or tissue

insularism

ˈin(t)-su̇-lə-ˌri-zəm 

-syu̇-

ˈin-shə-lə-

noun

insularity

ˌin(t)-su̇-ˈler-ə-tē 

-ˈla-rə- -syu̇-

ˌin-shə-ˈler-ə-

-ˈla-rə-

noun

insularly

ˈin(t)-su̇-lər-lē 

-syu̇-

ˈin-shə-

adverb

Synonyms

• parochial
• small
• petty
• narrow

Examples of insular in a Sentence

the insular world of boarding schools

an insular community that is not receptive of new ideas, especially from outsiders

Recent Examples on the Web

Unlike Chakrabarti, Wiener has also been a part of San Francisco’s insular community for decades, and has his own base of support — though he is considered a moderate to Chakrabarti’s progressiveness. —Anita Chabria, Mercury News, 22 Oct. 2025

Daniels insisted the impact of the shutdown on air traffic controllers was not just insular and would continue to impact the aviation sector and broader American economy. —Sasha Rogelberg, Fortune, 20 Oct. 2025

The recurrent staging only makes the show’s narrative feel more insular, which works fine when there’s forward momentum, but this one is stuck looking backward. —Ben Travers, IndieWire, 16 Oct. 2025

That has led some analysts to warn that increasingly insular investments could mask weaknesses within the giants driving the AI boom. —Christina Wilkie, NBC news, 14 Oct. 2025

Word History

Etymology

Late Latin insularis, from Latin insula island

First Known Use

1611, in the meaning defined at sense 2a

Rhymes for insular

• peninsular

Kids Definition

insular

adjective

in·​su·​lar ˈin(t)s-(y)ə-lər 

ˈin-shə-lər

1

: of, relating to, or forming an island

2

: being isolated or detached

an insular building

3

: not open to new or different ideas : narrow

an insular viewpoint

insularity

ˌin(t)s-(y)ə-ˈlar-ət-ē 

ˌin-shə-ˈlar-

noun

Medical Definition

insular

adjective

in·​su·​lar -lər 

: of or relating to an island of cells or tissue (as the islets of Langerhans or the insula)