under one year

USAGE SUMMARY

The phrase "under one year" is correct and usable in written English.
It can be used to describe a duration of time that is less than one year, often in contexts such as age, experience, or time limits. Example: "The warranty for this product is valid for under one year from the date of purchase."

✓ Grammatically correct

Science

News & Media

Formal & Business

Human-verified examples from authoritative sources

Exact Expressions

56 human-written examples

Usually leased, they tend to under one year old and come with full breakdown cover.

The Guardian - Money

That summer, I entered her in the local agricultural fair, in the category "Sow Under One Year".

The New York Times - Magazine

They would also be permitted to look after two children under one year of age, instead of the current one.

The Guardian - Money

But it was only available for babies under one year old, being deemed too expensive to give to all children.

The Guardian

She has been working in HR for four years and in a part-time capacity for just under one year.

The Guardian

No bodies were totally skeletonised in under one year.

Science & Justice

Patients aged under one year are excluded from the analysis.

Health Economics Review

Human-verified similar examples from authoritative sources

Similar Expressions

4 human-written examples

HCs are not staffed to provide this level of care for the under one-year population.

BMC Pediatrics

Infants and children under one-year-old are at greater risk of developing serious cases of measles.

The Guardian

The specification from the vaccine makers is that they will not guarantee safety and efficacy for under one-year-olds.

The Guardian - Travel

The HMGS model was simulated under one-year weather conditions data.

Energy

Expert writing Tips

Best practice

When describing the age of infants or young children, use "under one year" to clearly indicate they have not yet reached their first birthday. For example, "Infants under one year old require special care."

Common error

Be precise when using the phrase "under one year". Avoid vague statements; provide context to ensure readers understand the specific timeframe being discussed. For instance, instead of saying "The project was completed under one year", specify "The project was completed in under one year, exceeding initial expectations".

Linguistic Context

The phrase "under one year" typically functions as an adverbial phrase modifying a verb or adjective, indicating a duration or age. Ludwig AI provides numerous examples where this phrase specifies the time frame for various events or conditions.

Expression frequency: Very common

Frequent in

Science

50%

News & Media

24%

Formal & Business

11%

Less common in

Wiki

7%

Encyclopedias

4%

Reference

0%

Ludwig's WRAP-UP

The phrase "under one year" is a common and grammatically correct way to indicate a duration shorter than a year. As Ludwig AI indicates, it frequently appears in scientific, news, and business contexts, describing durations, ages, or project timelines. While interchangeable with phrases like "less than a year", it's important to maintain clarity by providing context when specifying timeframes. Whether discussing infant care, project completion, or warranty periods, "under one year" offers a concise way to define a sub-annual duration.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

less than a year

This alternative directly states that the duration is shorter than a year.

within a year

This specifies that something occurs inside the timeframe of one year.

shorter than a year

This phrase highlights the brevity of the period.

not yet a year old

Specifically used for age, emphasizing the subject hasn't reached one year.

less than twelve months

Uses months to specify the period, providing a different unit of measurement.

before their first birthday

Refers specifically to the time before a child's first birthday.

in less than a year's time

Adds a more formal or emphatic tone.

before reaching one year

Highlights the progression towards the one-year mark.

prior to turning one

Focuses on the age and the act of becoming one year old.

younger than one year

Directly compares the age to one year.

FAQs

What is the difference between "under one year" and "less than one year"?

The phrases "under one year" and "less than one year" are generally interchangeable. Both indicate a period shorter than a full year, but "under one year" is slightly more informal.

When should I use "under one year" instead of specifying months?

Use "under one year" when you want to give a general idea of the duration without being overly specific. If precision is needed, specifying the number of months (e.g., "10 months") might be more appropriate.

Can I use "under one year" for things other than age?

Yes, "under one year" can be used to describe any duration of time that is shorter than a year, such as project timelines or warranty periods. For example, "The warranty is valid for "less than twelve months"".

Is it correct to say "under one year old" or should I just say "under one year"?

Both "under one year old" and "under one year" are acceptable. "Under one year old" is more explicit when referring to age, while "under one year" is often used in broader contexts to describe a duration. Context usually makes the meaning clear.