idealism

noun

ide·​al·​ism ī-ˈdē-(ə-)ˌliz-əm 

ˈī-(ˌ)dē-

1

a

: the practice of forming ideals or living under their influence

Slowly, a distinctive blue-collar counterculture emerged; it was harsher, more anarchic. … There was none of the philosophical posturing, little of the youthful idealism.

—Joe Klein

b

: something that is idealized

… the real enemy of chivalric love, with its idealisms and quixotic denials … is permissiveness …

—Cleanth Brooks

2

philosophy

a(1)

: a theory that ultimate reality lies in a realm transcending phenomena

(2)

: a theory that the essential nature of reality lies in consciousness or reason

b(1)

: a theory that only the perceptible is real

(2)

: a theory that only mental states or entities are knowable

3

: literary or artistic theory or practice that affirms the preeminent value of imagination as compared with faithful copying of nature compare realism

Examples of idealism in a Sentence

Recent Examples on the Web

Speaking to supporters gathered at Brooklyn Paramount theater, Mamdani celebrated the success of his ambitious, unapologetic campaign, promising a government not just of hope and idealism but one that will deliver both compassion and competence. —Time Video, Time, 5 Nov. 2025

Social media savvy, humor, idealism and staying on message about the city’s affordability crisis helped Mamdani overwhelmingly win over young voters and others willing to look past his lack of experience. —Jill Goldsmith, Deadline, 5 Nov. 2025

In it, novice nun Viridiana (Silvia Pinal) does her utmost to maintain her Catholic principles, but her lecherous uncle (Fernando Rey) and a motley assemblage of paupers force her to confront the limits of her idealism. —Ryan Lattanzio, IndieWire, 5 Nov. 2025

How Brian Schaefer learned to embrace idealism. —Literary Hub, 5 Nov. 2025

Word History

First Known Use

circa 1743, in the meaning defined at sense 2a(1)

Rhymes for idealism

• surrealism
• neorealism

Kids Definition

idealism

noun

ide·​al·​ism ī-ˈdē-(ə-)ˌliz-əm 

ˈī-(ˌ)dē-

: the practice of forming ideals or living under their influence

idealist

-(ə-)ləst

noun

idealistic

(ˌ)ī-ˌdē-(ə-)ˈlis-tik

ˌī-dē-

adjective

idealistically

-ti-k(ə-)lē

adverb