Meaning of the word "that is to say" in English

What does "that is to say" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

that is to say

US /ðæt ɪz tə seɪ/
UK /ðæt ɪz tə seɪ/
"that is to say" picture

Phrase

1.

used to introduce a clarification or explanation of a preceding statement

Example:
He is a polyglot, that is to say, he speaks many languages.
The event is scheduled for next Tuesday, that is to say, October 26th.
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