Night and day
adverb
All the time; constantly; with a big difference.
Her life improved night and day when she got a new job.
Often appears as...
- improve night and day
- change night and day
Usage tips
Idiomatic
noun
The twenty-four hour period of a day.
Work at the factory went on night and day.
Often appears as...
- work night and day
- labor night and day
adjective
Showing a striking or complete difference.
The difference between the two plans is like night and day.
Often appears as...
- difference is night and day
- change is night and day
Usage tips
Idiomatic
adverb
All the time; constantly; with a big difference.
Her life improved night and day when she got a new job.
Often appears as...
- improve night and day
- change night and day
Usage tips
Idiomatic
noun
The twenty-four hour period of a day.
Work at the factory went on night and day.
Often appears as...
- work night and day
- labor night and day
adjective
Showing a striking or complete difference.
The difference between the two plans is like night and day.
Often appears as...
- difference is night and day
- change is night and day
Usage tips
Idiomatic
Definition 1 of 3
Pro Tip 1/2Frequency Intensity
Indicates something happens very often or is vastly improved, suggesting a complete turnaround in a situation.
Since studying regularly, his grades have improved night and day.
Pro Tip 2/2Not Literal
Used metaphorically to emphasize dramatic change or persistence, not to describe actual time of day.
Her mood swings are night and day, you never know what to expect.
Pro Tip 1/2Frequency Intensity
Indicates something happens very often or is vastly improved, suggesting a complete turnaround in a situation.
Since studying regularly, his grades have improved night and day.
Pro Tip 2/2Not Literal
Used metaphorically to emphasize dramatic change or persistence, not to describe actual time of day.
Her mood swings are night and day, you never know what to expect.
Pro Tip 1/2Frequency Intensity
Indicates something happens very often or is vastly improved, suggesting a complete turnaround in a situation.
Since studying regularly, his grades have improved night and day.
Pro Tip 2/2Not Literal
Used metaphorically to emphasize dramatic change or persistence, not to describe actual time of day.
Her mood swings are night and day, you never know what to expect.
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