# TOS

CEFR C2 · Noun

Source: https://englishreference.com/word/tos
Updated: 2026-05-10

## Definition

Stands for Terms of Service. It is the list of rules you must agree to before using a website or app.

For teachers: Abbreviation for Terms of Service. It represents the legal agreement between a service provider and a user. Often used in the plural to refer to the specific clauses within the contract.

## Examples

- You should read the TOS before clicking 'agree'.
- The social media platform updated its TOS to clarify how user data is shared with advertisers.
- Legal experts argue that the dense language found in a typical TOS effectively prevents the average consumer from understanding their privacy rights.

## Usage notes

- Often treated as a collective singular noun or a plural noun; frequently preceded by the definite article.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.