Steadfast | Definition of steadfast by Merriam-Webster

Full Definition of STEADFAST

1

a : firmly fixed in place : immovable

b : not subject to change <the steadfast doctrine of original sin — Ellen Glasgow>

2

: firm in belief, determination, or adherence : loyal <her followers have remained steadfast>

— stead·fast·ly adverb

— stead·fast·ness \-ˌfas(t)-nəs, -fəs(t)-\ noun

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Origin of STEADFAST

Middle English stedefast, from Old English stedefæst, from stede + fæst fixed, fast

First Known Use: before 12th century

Related to STEADFAST

Synonyms: constant, dedicated, devoted, devout, down-the-line, fast, good, loyal, pious, staunch (also stanch), faithful, steady, true, true-blue

Antonyms: disloyal, faithless, false, fickle, inconstant, perfidious, recreant, traitorous, treacherous, unfaithful, untrue

Synonym Discussion of STEADFAST

faithful, loyal, constant, staunch, steadfast, resolute mean firm in adherence to whatever one owes allegiance. faithful implies unswerving adherence to a person or thing or to the oath or promise by which a tie was contracted <faithful to her promise>. loyal implies a firm resistance to any temptation to desert or betray <remained loyal to the czar>. constant stresses continuing firmness of emotional attachment without necessarily implying strict obedience to promises or vows <constant friends>. staunch suggests fortitude and resolution in adherence and imperviousness to influences that would weaken it <a staunch defender of free speech>. steadfast implies a steady and unwavering course in love, allegiance, or conviction <steadfast in their support>. resolute implies firm determination to adhere to a cause or purpose <a resolute ally>.