that is to say

1. 1.

   as follows

   Synonymsnamelyviz.to witvidelicet

Questions about that is to say

What does that is to say mean?

that is to say means "as follows".

What is another word for that is to say?

Close synonyms include namely, viz., to wit, videlicet. Each sense on this page lists its own synonyms, because a word with several meanings rarely has one substitute that works for all of them.

Is that is to say a common word?

that is to say is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.