fundamentally

adverb

fun·​da·​men·​tal·​ly ˌfən-də-ˈmen-tᵊl-ē 

: with regard to what is basic, essential, or fundamental : at a fundamental level

a fundamentally honest person

a fundamentally new/different approach

Most theories of the internal structure of Venus begin with the assumption that the planet is fundamentally similar to the earth …

—Andrew and Louise Young

: in a basic or fundamental manner

This "disposable" work force is the most important trend in business today, and it is fundamentally changing the relationship between Americans and their jobs.

—Janice Castro

Examples of fundamentally in a Sentence

Recent Examples on the Web

Gen Z has fundamentally redefined what responsible spending looks like. —Nick Molnar, Fortune, 13 Nov. 2025

Advertisement All of this Mormon pop culture has helped to create an impression of a religion comparable to, say, Catholicism, with adherents ranging from orthodox to casual and a history of covering up abuse that has stained its establishment without fundamentally discrediting its belief system. —Judy Berman, Time, 12 Nov. 2025

As General Manager of Design at IBM, Phil Gilbert fundamentally changed how nearly 400,000 employees worked. —Big Think, 12 Nov. 2025

Critics argue the ballroom's sheer scale—twice the size of the main residence—will fundamentally alter the White House's historic proportions and architectural balance. —Adeola Adeosun, MSNBC Newsweek, 11 Nov. 2025

Word History

First Known Use

15th century, in the meaning defined above

Rhymes for fundamentally

• accidentally
• detrimentally
• governmentally
• incidentally
• incrementally
• instrumentally
• sentimentally
• temperamentally
• coincidentally
• environmentally
• experimentally
• mentally