constant
The temperature remained constant throughout the day.
The temperature did not change at all during the day.
Occurring continuously over a period of time; not changing.
The company maintained a constant flow of customers.
The company had a steady, unchanging number of customers.
Often used to describe steady, unvarying conditions.
A quantity that does not vary under specified conditions.
In the equation y = 3x + 5, 5 is a constant.
The number 5 does not change in this linear equation.
In math, a constant is a fixed value that does not depend on other variables.
A person who is faithful and dependable.
She was a constant in his life during difficult times.
She remained loyal and unchanging in her support for him.
Often used metaphorically to describe someone reliable.
Collocations
Pro Tip
Avoid confusion with similar words
'Constant' implies no change at all, while 'continual' suggests frequent but interrupted activity. 'Continuous' means without interruption. Example: 'The machine produces a constant hum' (no variation) vs. 'The machine makes continual noise' (frequent but may pause).
Gold Rule
When to use 'constant'
Use 'constant' when describing something that remains unchanged over time or under specific conditions. It emphasizes stability and lack of variation.
Word Origin
From Latin *constant-* (present participle of *constare* 'to stand firm, endure'), from *con-* 'together' + *stare* 'to stand'. Entered English in the 14th century with meanings related to steadfastness and reliability.
Usage Notes
As an adjective, 'constant' often describes something that remains the same over time. In mathematics, it refers to a fixed value. Avoid confusing with 'continual' (frequent but with interruptions) or 'continuous' (unbroken).