self-interest

noun

self-in·​ter·​est ˌself-ˈin-t(ə-)rəst 

-ˈin-tə-ˌrest,

-ˌtrest;

-ˈin-tərst

1

: a concern for one's own advantage and well-being

acted out of self-interest and fear

2

: one's own interest or advantage

self-interest requires that we be generous in foreign aid

self-interested

ˌself-ˈin-t(ə-)rə-stəd 

-ˈin-tə-ˌre-

-ˈin-ˌtre-;

-ˈin-tər-

adjective

self-interestedly adverb

self-interestedness noun

Synonyms

• selfishness
• selfness
• vanity
• ego
• egoism

Examples of self-interest in a Sentence

her degree of self-interest is perhaps best reflected in her favorite topic of conversation—herself

Recent Examples on the Web

Our egos and self-interests and preferences and quirks – these are very difficult to blend in a cohesive fashion. —Nick Tzitzon, Fortune, 18 Oct. 2025

The protagonist’s diabolical plot is fuelled by an unmanageable tangle of emotions, including raging jealousy, mercenary self-interest, and resentment of Eileen’s professional and intellectual accomplishments, which sparks shame at her own cosseted frivolity. —Richard Brody, New Yorker, 17 Oct. 2025

Perhaps that’s by design, and Byun is bending his own form towards a damning commentary on universal self-interest — even in the face of a crisis. —David Ehrlich, IndieWire, 15 Oct. 2025

Is there perhaps some self-interest at play here? —Carlo Versano, MSNBC Newsweek, 13 Oct. 2025

Word History

First Known Use

1595, in the meaning defined at sense 2

Rhymes for self-interest

• abreast
• accessed
• addressed
• appressed
• armrest
• arrest
• assessed
• attest
• backrest
• behest
• bequest
• caressed

Kids Definition

self-interest

noun

self-in·​ter·​est

ˈsel-ˈfin-trəst,

-ˈfint-ə-rəst

1

: a concern for one's own advantage

acted out of self-interest and fear

2

: one's own interest or advantage