1 of 2


con·​stant ˈkän(t)-stənt How to pronounce constant (audio)
: marked by firm steadfast resolution or faithfulness : exhibiting constancy of mind or attachment
a constant friend
: invariable, uniform
a constant flow
should be stored at a constant temperature
: continually occurring or recurring : regular
a constant annoyance
suffers from constant headaches


2 of 2


: something invariable or unchanging: such as
: a number that has a fixed value in a given situation or universally or that is characteristic of some substance or instrument
: a number that is assumed not to change value in a given mathematical discussion
: a term in logic with a fixed designation
: something or someone that is reliably present or available
My parents put in me in piano lessons when I was really young, so music has always been a constant in my life. Mélat
He's my constant for when I seek guidance both on a professional and personal front. Gautam Mehra
Choose the Right Synonym for constant

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

continual, continuous, constant, incessant, perpetual, perennial mean characterized by continued occurrence or recurrence.

continual often implies a close prolonged succession or recurrence.

continual showers the whole weekend

continuous usually implies an uninterrupted flow or spatial extension.

football's oldest continuous rivalry

constant implies uniform or persistent occurrence or recurrence.

lived in constant pain

incessant implies ceaseless or uninterrupted activity.

annoyed by the incessant quarreling

perpetual suggests unfailing repetition or lasting duration.

a land of perpetual snowfall

perennial implies enduring existence often through constant renewal.

a perennial source of controversy

Example Sentences

Adjective He suffers from constant headaches. Her constant chatter was a nuisance. The house is in constant need of repairs. The scar serves as a constant reminder of the accident. a problem demanding constant attention The equipment should be stored at a constant temperature. He kept the car's speed constant. She has struggled to maintain a constant weight. They remained constant friends throughout their lives. Noun Her job was the one constant in her life. See More
Recent Examples on the Web
There's a near-constant competition for our attention these days. Dr. Michael Daignault, USA TODAY, 17 Nov. 2022 After decades of near-constant expansion, Amazon began laying off corporate workers on Tuesday, becoming the latest tech giant to slash its workforce in recent weeks. Julian Mark, Washington Post, 15 Nov. 2022 For all the techno wizardry of a new five-link rear suspension, air springs, and active anti-roll bars, the default Auto terrain response mode still allows for near-constant nodding body motions over all but the smoothest tarmac. Joe Lorio, Car and Driver, 11 Nov. 2022 But in private, both their impetuous backstabbing and their haunting loneliness are near-constant reminders that the scaffolding of their union is a lie. Lauren Puckett-pope, ELLE, 9 Nov. 2022 The state had previously sued Uniontown over discharges from its failing sewage treatment system in 2005 and 2012, gaining a court order to force the city to address near-constant sewer overflows. Dennis Pillion |, al, 2 Nov. 2022 Britons have grown accustomed to near-constant governmental and economic crises since the country narrowly voted six years ago to exit the European Union. Los Angeles Times, 20 Oct. 2022 The progression is dark and mostly unresolved, creating a near-constant tension. Tom Roland, Billboard, 19 Oct. 2022 The hourlong primary debate, featuring Lake and three challengers, was filled with back-and-forth polemics and near-constant interruptions. Taylor Seely, The Arizona Republic, 12 Oct. 2022
But underlying all these seasonal factors is the constant of extremely high vehicular emissions. Time, 28 Oct. 2022 While there were no incidents of electrocution, horses and livestock were in constant of stepping on the third rail, which resulted in the company placing wooden scantlings around the live rail. Baltimore Sun, 10 Sep. 2022 Carter has been a constant on the Alabama music scene ever since, as a solo performer and frontman for bands such as Rollin’ in the Hay, Frankie Velvet and the Mighty Veltones, and Rick Carter and the League of Legendary Artists. Mary Colurso |, al, 9 Feb. 2022 New defensive coordinator Jim Knowles isn’t going to be a constant on the recruiting trail. Stephen Means, cleveland, 21 Jan. 2022 The wail of ambulances in the background was a constant. Gary Rivlin, Time, 2 Nov. 2022 The Indian Health Center was a constant in her life from that point on. Ashley Luthern, Journal Sentinel, 25 Oct. 2022 Celebrity judges like Pharrell, Shakira and Miley Cyrus rotated in and out for subsequent seasons, but Shelton had been the constant. Mark Heim |, al, 12 Oct. 2022 Since its launch in 1999, Dior’s J’Adore has been a constant on the list of best-selling fragrances. Janelle Okwodu, Vogue, 5 Oct. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'constant.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History


Adjective and Noun

Middle English, from Middle French, from Latin constant-, constans, from present participle of constare to stand firm, be consistent, from com- + stare to stand — more at stand

First Known Use


14th century, in the meaning defined at sense 1


1832, in the meaning defined above

Time Traveler
The first known use of constant was in the 14th century

Dictionary Entries Near constant

Cite this Entry

“Constant.” Dictionary, Merriam-Webster, Accessed 26 Nov. 2022.

Kids Definition

constant 1 of 2


con·​stant ˈkän(t)-stənt How to pronounce constant (audio)
: always faithful and true
constant friends
: remaining steady and unchanged
a constant temperature
: occurring over and over again
constant headaches
constantly adverb


2 of 2


: something unchanging
especially : a quantity whose value does not change under given mathematical conditions compare variable sense 1

Medical Definition

constant 1 of 2


con·​stant ˈkän(t)-stənt How to pronounce constant (audio)
: remaining unchanged
constantly adverb


2 of 2


: something invariable or unchanging
especially : a number that has a fixed value in a given situation or universally or that is characteristic of some substance or instrument

More from Merriam-Webster on constant

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

The Great British Vocabulary Quiz

  • union jack speech bubble
  • Named after Sir Robert Peel, what are British police called?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Universal Daily Crossword

A daily challenge for crossword fanatics.