outside sources

Meanings

1. 1nounplural

   Information or evidence that comes from people, books, or organizations not directly involved in a project or argument.

   Grammar: Always plural; use with a plural verb, e.g. 'Outside sources are cited.'

   Patterns

   • use outside sources
   • cite outside sources
   • rely on outside sources

   The report was based on outside sources, not just internal data.

   Students must cite all outside sources in their essays.

   We need to verify the claim with outside sources before publishing.

2. 2nounplural

   People or groups from outside an organization who provide information or help.

   Grammar: Refers to external people or groups; often used in business or journalism.

   Patterns

   • consult outside sources
   • outside sources say
   • according to outside sources

   According to outside sources, the company is planning to merge.

   The investigation relied on outside sources for key details.

   We should not depend solely on outside sources for our security.

Common combinations

cite outside sources

You must cite outside sources properly to avoid plagiarism.

rely on outside sources

The article relies on outside sources for its main claims.

outside sources say

Outside sources say the deal will be announced tomorrow.

use outside sources

The researcher used outside sources to support her findings.

Synonyms and how they differ

external sources

Very similar, but 'external' is more formal and often used in business or technical contexts.

third-party sources

Emphasizes that the source is independent; common in legal and business writing.

Opposites

Commonly confused: outside sources or outside source?

Practice

Make it your own

Write a sentence using “outside sources”, then check it and compare it with the examples above.

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