that is to say
that
ðæt
dhāt
is
ɪz
iz
to
say
seɪ
sei

Definition & Meaning of "that is to say"in English

that is to say
01

used to introduce an explanation or clarification of a point just made 

Collocation
Grammatical Information
Examples
The project must be completed by the end of the month, that is to say, within the next two weeks. 
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