id est
Definitions
That is; used to introduce an explanation or clarification of a preceding statement.
In other words; used to provide a more precise definition or restatement of a term.
Examples
The museum is closed on Mondays, id est, the first day of the work week.
He is a polyglot, id est, someone who is proficient in multiple languages.
The project must be completed by Friday, id est, before the weekend begins.
Synonyms
that is in other words namely specifically to wit viz that is to say