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Definitions

steadfast

[sted-fast, -fahst, -fuhst] / ˈstɛdˌfæst, -ˌfɑst, -fəst /
ADJECTIVE
loyal, steady
Synonyms
STRONGEST
abiding adamant ardent dedicated faithful inflexible intense relentless resolute rigid single-minded staunch stubborn true unflinching unqualified unswerving unwavering unyielding
WEAK
allegiant bound changeless constant dependable enduring established fast firm fixed immobile immovable inexorable intent liege never-failing obdurate persevering reliable stable sure tried-and-true true-blue unbending unfaltering unmovable unquestioning wholehearted
Antonyms
STRONGEST
afraid dishonest disloyal false flexible irresolute pliable pliant soft unreliable wavering weak willing yielding
WEAK
untrustworthy

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

He was steadfast that all he was doing was helping, that the objections were cosmetic, and overblown.

From Slate • Mar. 25, 2026

Though both O’Brien and McClory say they’re eager for new “Buffy” material down the line, their support for the show remains steadfast.

From Los Angeles Times • Mar. 16, 2026

Brook was also steadfast in his defence of McCullum on Thursday night, saying the former New Zealand captain was "125%" the man to continue.

From BBC • Mar. 5, 2026

“We have been steadfast supporters of Pinterest since we first invested in 2022, and have strong conviction in the company’s trajectory,” said Marc Steinberg, a partner at Elliott and a member of Pinterest’s board.

From The Wall Street Journal • Mar. 3, 2026

Eunice Smith was Katherines steadfast companion and confidante.

From "Hidden Figures" by Margot Lee Shetterly