The store is closed, that is, it opens tomorrow.
that is
idiomyou use this to give more specific details or to explain what you just said in a clearer way.
Origin
disputed originInherited from Old English þæt is.
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.
Last updated April 22, 2026