# that is

idiom · CEFR B2

Source: https://englishreference.com/idiom/that-is
Updated: 2026-04-22

## Meaning

you use this to give more specific details or to explain what you just said in a clearer way.

## Examples

- The store is closed, that is, it opens tomorrow.
- The meeting is mandatory, that is, everyone on the team must attend without exception.
- The project requires total dedication, that is, you must commit your full attention and resources to ensure its success before the deadline.

## Origin

From Old English þæt is.

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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.