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Technical Vocabularyphrasal verb · /ˈfɪltər aʊt/

filter out

filter out — To remove or exclude unwanted or irrelevant data or information.

In simple English

To exclude irrelevant or unwanted data from a dataset or list. Common when processing data, running queries, or cleaning up results.

Someone heard this at work when discussing data processing, search results, or cleaning up information.

At a glanceCEFR B1–B2
Commonness4/5
Versatility5/5
FormalityCasualFormalNeutral
Spoken ↔ WrittenSpokenWrittenBoth
Directness ↔ DiplomaticDirectDiplomaticNeutral
RegionUS and UK

Say it like this

  • Let's filter out the test data before we run the report.
  • The API filters out inactive users automatically.
  • We need to filter out null values from the response.
  • Can you filter out duplicates before the import?
  • I filtered out all the noise from the logs.

Use it at work

Data

  • Let's filter out test users from the report.
  • I filtered out bots, and traffic dropped by 20%.

Alerts

  • Can we filter out these noisy alerts?
  • Filter out anything below warning level.

Email and Slack

  • I filter out notifications during focus time.
  • Our spam filter filtered out the client's email.

Don't say this

✕We need to filter the spam emails.
✓We need to filter out the spam emails.

The phrasal verb 'filter out' needs 'out' to mean remove. 'Filter' alone means to pass through a filter, not necessarily remove.

Practice

Try it

4 quick exercises

Choose the most natural sentence

1. Which sentence sounds most natural for a code review?

Find the error

2. Which sentence has a mistake?

Complete the sentence

3. Can you _____ inactive users before generating the report?

Rewrite more naturally

4. Rewrite this sentence: 'We need to remove the spam emails so they don't appear in the inbox.'

Say it out loud

Phrase 1 of 5

"Let's filter out the test data before we run the report."

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More about filter out

Real examples(7)

  • Standup

    "Yesterday I worked on filtering out spam emails from reaching users' inboxes."

  • Slack message

    "Hey, can you filter out the test accounts from the analytics dashboard?"

  • GitHub PR

    "This PR adds logic to filter out invalid entries before saving to the database."

  • Jira ticket

    "AC: The search results should filter out archived items by default."

  • Retrospective

    "We should filter out low-priority bugs from the sprint board to stay focused."

  • Sprint planning

    "Let's filter out the completed tasks and focus on what's left for this sprint."

  • Pair programming

    "Here, we can filter out empty strings using this array method."

More mistakes(2)

  • ✕The system filters out only the good data.
    ✓The system filters out bad data and keeps the good data.

    Filter out means to remove, not to keep. You filter out what you don't want.

  • ✕I filtered out them from the list.
    ✓I filtered them out from the list.

    With phrasal verbs, pronouns go between the verb and particle (filter + them + out).

Other forms(5)

  • filter out base form

    "We filter out duplicates before processing."

  • filters out third person

    "The system filters out invalid requests."

  • filtered out past tense

    "I filtered out all the null values yesterday."

  • filtering out present participle

    "We're filtering out inactive users."

  • filtered out past participle

    "The data has been filtered out already."

Often used with(6)

  • filter out noise · Remove irrelevant or distracting information from data or logs
  • filter out duplicates · Remove repeated entries from a dataset
  • filter out spam · Remove unwanted or junk messages
  • filter out invalid data · Remove data that doesn't meet requirements
  • filter out null values · Remove empty or undefined values from data
  • automatically filter out · Remove items without manual intervention

Similar words(5)

  • exclude · More formal; often used in documentation and queries
  • remove · Simpler and more general; doesn't imply keeping the rest
  • strip out · More casual; often used for formatting or unnecessary content
  • weed out · Informal; implies careful selection over time
  • omit · More formal; common in technical documentation

Opposites(5)

  • include
  • keep
  • add in
  • retain
  • filter for

Questions(6)

What's the difference between 'filter' and 'filter out'?
'Filter' means to pass something through a filter (keeping or separating). 'Filter out' specifically means to remove or exclude the unwanted items. In tech, 'filter out spam' means remove spam, while 'filter for active users' means keep only active users.
Can I use 'filter out' in formal documentation?
Yes, 'filter out' is appropriate for both casual conversation and formal technical documentation. It's standard vocabulary in software development.
Is 'filter out' the same as 'delete'?
Not exactly. 'Filter out' means to exclude or hide items from a result or view. 'Delete' means to permanently remove something. Filtered items often still exist but aren't shown.
How do I use pronouns with 'filter out'?
Put pronouns between 'filter' and 'out': 'filter them out', 'filter it out'. Don't say 'filter out them'. With nouns, both work: 'filter out the spam' or 'filter the spam out'.
What's the opposite of 'filter out'?
The opposite is 'filter for' or 'include'. When you 'filter out' spam, you remove it. When you 'filter for' active users, you keep only those users.
Can 'filter out' be used for people or just data?
'Filter out' is mostly used for data, records, or messages in tech contexts. For people, you might say 'exclude' instead, like 'exclude test users from analytics'.
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