filter out: meaning, definition, pronunciation and examples
B2Neutral; common in technical, business, and general contexts.
Quick answer
What does “filter out” mean?
To remove unwanted elements from a substance, group, or information stream by passing it through a selective process.
Audio
Pronunciation
Definition
Meaning and Definition
To remove unwanted elements from a substance, group, or information stream by passing it through a selective process.
To deliberately exclude, disregard, or ignore certain items, people, or information based on specific criteria, often as a conscious mental or procedural act of selection.
Dialectal Variation
British vs American Usage
Differences
No significant difference in core meaning. Slight preference for 'filter out' in both. The simple verb 'filter' can sometimes be used synonymously, especially in technical contexts.
Connotations
Identical connotations of removal, purification, and selective exclusion.
Frequency
Equally common in both varieties.
Grammar
How to Use “filter out” in a Sentence
[Subject] filters out [Object][Subject] filters [Object] out (separable phrasal verb)Vocabulary
Collocations
Examples
Examples of “filter out” in a Sentence
verb
British English
- The software helps to filter out spam emails automatically.
- We need to filter out any biased responses from the survey data.
- The lake's reed beds filter out pollutants from the water.
American English
- The program filters out unwanted pop-up ads.
- Try to filter out the background noise during the recording.
- Management filtered out the least viable proposals early in the process.
adverb
British English
- N/A - 'filter out' is not used as an adverb.
American English
- N/A - 'filter out' is not used as an adverb.
adjective
British English
- The filtered-out sediment was collected for analysis. (less common, participial adjective)
- Use filtered-out data with caution.
American English
- The filtered-out impurities can clog the system.
- She reviewed the filtered-out candidate list.
Usage
Meaning in Context
Business
Used for selecting candidates, analysing key data from reports, or focusing on relevant market signals.
Academic
Describes methodological processes in research, e.g., filtering out confounding variables or irrelevant data points.
Everyday
Common for discussing email spam, water purification, or ignoring distractions.
Technical
Core term in computing (network filtering, data processing), electronics (signal processing), and chemistry.
Watch out
Common Mistakes When Using “filter out”
- Using 'filter off' (incorrect).
- Using non-separable structure, e.g., 'I filtered the spam' (can be correct but less specific than 'filtered out the spam').
- Confusing with 'sort out' (which implies organizing, not just removing).
FAQ
Frequently Asked Questions
Yes. You can say 'filter out the noise' or 'filter the noise out'.
'Filter' is the general process. 'Filter out' specifically emphasizes the removal or exclusion of the unwanted part. Often used interchangeably, but 'out' adds emphasis on removal.
Yes, often in contexts of selection or exclusion, e.g., 'The first round of interviews filtered out most applicants.'
Not directly. You would use 'filtration' for the process or 'filter' for the device. The result is 'filtered-out [items]' (as an adjective).
To remove unwanted elements from a substance, group, or information stream by passing it through a selective process.
Filter out is usually neutral; common in technical, business, and general contexts. in register.
Filter out: in British English it is pronounced /ˈfɪltə aʊt/, and in American English it is pronounced /ˈfɪltɚ aʊt/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “Filter out the noise (focus on what's important)”
- “Filter out the chaff (separate the worthless from the valuable)”
Learning
Memory Aids
Mnemonic
Imagine a COFFEE FILTER. The good coffee (what you want) goes through INTO your cup. The grounds (what you don't want) are kept OUT. You 'filter OUT' the grounds.
Conceptual Metaphor
THINKING/PERCEPTION IS FILTERING (We filter out irrelevant information to understand).
Practice
Quiz
In which context is 'filter out' used MOST metaphorically?