constant
Noun pluralconstants
Pluralconstants
- 1Happening again and again without stopping for long.
Like a leaky faucet that keeps dripping and never quite stops.
The constant noise from traffic kept her awake all night.
His phone buzzed with constant messages during the meeting.
Similarcontinuous, persistent, endless, continual, nonstop
Oppositeintermittent, occasional, sporadic
Note
- 2Staying the same all the time and never changing.
Like the North Star, always in the same spot in the sky.
The temperature deep in the cave stays constant all year.
She kept the car at a constant speed on the highway.
UsageSay at a constant speed, or that something stays constant.
Similarsteady, stable, fixed, unchanging, uniform
Oppositevariable, fluctuating, inconstant, irregular
- 3In math and science, a number or amount that stays the same and does not change.
Like a rule that never changes while you play the whole game.
In this equation, pi is a constant.
The teacher told us to treat that value as a constant.
Note
- 4Something that does not change while other things around it do.
Like solid ground that stays still while everything else moves.
People say that change is the only constant in life.
Through all the moves, family stayed her one constant.
- 5Staying loyal and steady in your feelings or actions.
Like a friend who is always there, no matter what happens.
He was a constant friend through all her troubles.
He stayed constant to his old friend through all the hard times.
UsageSay constant to a friend, or constant in your love.
Similarfaithful, loyal, steadfast, devoted, true
Oppositefickle, inconstant, unfaithful, disloyal
Note
Less common meanings
- 6A name in a program that always points to the same value.
Like a labeled box whose contents never change.
The programmer set the tax rate as a constant.
We named the constant so the code is easier to read.
Oppositevariable
Note
- 7Firm and solid in shape, not runny or liquid.
Note
- 8Making sense all the way through, with no part going against another.
I am no more mad than you are: make the trial of it with any constant question.
c. 1601, William Shakespeare, “Twelfe Night, or What You Will”Here, constant means logical and making sense all the way through.Note
- 9Staying below a fixed limit that does not grow as the input gets bigger.
Showing meanings only.
Practice
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Origin
It comes from Latin cōnstāre, meaning "to stand firm," and reached English through Old French.
Checked 7 Nov 2026 · 3 facts
- Constant ultimately derives from Latin cōnstāre. en.wiktionary.org
- Latin cōnstāre means “to stand firm.” en.wiktionary.org
- Constant reached English through Old French. en.wiktionary.org