that is (to say)
Definition of that is (to say)
1 —used when giving more accurate or specific information about someone or something that was just mentioned We—that is to say my wife and I—will be attending the wedding.
2 —used when giving information that affects something previously mentioned We plan on going to the concert—that is, if tickets are still available.
Word by Word Definitions
: to express in words : state
: to state as opinion or belief : declare
: utter, pronounce
: something that is said : statement
: an expression of opinion
: a right or power to influence action or decision
: about, approximately
: for example : as
Seen and Heard
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