that is to say


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Related to that is to say: upmost, To Say the Least

that is to say

In other words; or, to clarify or explain more clearly. No, I have never met him—that is to say, we've never been formally introduced. I'll be there this afternoon. That is to say, after about four o'clock or so.
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that is to ˈsay

in other words: We’ll meet again three days from now, that is to say on Friday.
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that is to say

In other words.
See also: say, that