narrow down + options
Reducing the number of choices
Use narrow down to limit possibilities or choices.
The committee must narrow down the applications
Narrow down vs. narrow in
Narrow down is the standard phrasal verb for reducing choices or focusing on a smaller group. Narrow in is generally not used with this meaning in standard English.
Quick answer
Should you use narrow down or narrow in?
Use narrow down when reducing options, possibilities, or focus. Narrow in is usually nonstandard for this meaning. English more commonly uses home in on or narrow something down.
We need to narrow down the list of candidates
The police narrowed down the search area
Researchers narrowed down the possible causes
The police narrowed down the search area
Researchers narrowed down the possible causes
Choose the pattern by meaning
These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.
narrow down to + number/result
Reaching a smaller final group
Use to after narrow down when stating the final result.
We narrowed the list down to three names
narrow down + search/focus
Making an investigation more precise
Use narrow down for searches, causes, or areas of focus.
Doctors are trying to narrow down the source of the infection
home in on + target
Useful alternative for focusing attention
Home in on means moving attention or effort toward a target.
The team quickly homed in on the main problem
See the difference in context
The same subject can take different constructions because each sentence answers a different question.
Construction
Example
Meaning
narrow down
We narrowed down the options to two.
Standard expression meaning reduce or limit.
narrow in
The phrase narrow in is generally nonstandard for reducing options.
Not usually used instead of narrow down.
narrow in on
Investigators narrowed in on the suspect.
Used by some speakers, especially in American English, meaning focus more closely on something.
home in on
The report homes in on the key issue.
Common alternative meaning focus closely.
Common mistakes
Some combinations appear in real text but do not mean what learners often assume.
Using narrow in instead of narrow down
Standard English uses narrow down for reducing choices.
✕ We need to narrow in the possibilities. ✓ We need to narrow down the possibilities.Forgetting down in the phrasal verb
Narrow alone does not usually express the same idea in everyday English.
✕ They narrowed the candidates. ✓ They narrowed down the candidates.Confusing narrow down with home in on
Narrow down reduces options; home in on focuses attention.
✕ We homed in on the list to three names. ✓ We narrowed down the list to three names.Quick practice
Choose the expression that matches the intended meaning.
1. We need to ___ the list of suppliers.
2. The investigators ___ the source of the leak.
3. The article really ___ the main problem.
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Frequently asked questions
Is narrow in ever correct?
Narrow in alone is generally not standard for the meaning reduce options. Some speakers use narrow in on, but narrow down is more widely accepted.
What does narrow down mean?
It means to reduce the number of possibilities or make something more precise.
Can I say narrow down to?
Yes. Use narrow down to when giving the final number or result, such as narrow it down to three choices.
Related preposition guides
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