C’est-à-dire (en. That's to say)

/sɛ.t‿a. diʁ/

Meaning & Definition

EnglishFrench
noun
Used to introduce an explanation of a term or fact.
She arrived late, that is to say, she missed the beginning of the meeting.
Elle est venue en retard, c’est-à-dire qu’elle a raté le début de la réunion.
To clarify a remark or idea.
The project failed, that is to say, it did not achieve its objectives.
Le projet a échoué, c’est-à-dire qu’il n’a pas atteint ses objectifs.
To rephrase something more precisely.
This solution is temporary, that is to say, it will not last.
Cette solution est temporaire, c’est-à-dire qu’elle ne durera pas.

Etymology

The expression comes from colloquial French, literally 'that is to say'.

Common Phrases and Expressions

that is to say that
An expression used to clarify what was previously said.
c’est-à-dire que
put another way
Used to rephrase an idea in simpler language.
c'est à dire autrement
it means that
Phrase to explain the meaning of an assertion.
cela signifie que

Related Words

therefore
Used to indicate the consequence or conclusion of something.
donc
consequently
Expression indicating a logical continuation or deduction.
par conséquent
indeed
Used to confirm or explain a previous assertion.
en effet

Slang Meanings

Basically
He took a day off, that is to say, basically, he won't be here tomorrow.
Il a pris un congé, c'est-à-dire, en gros, qu'il ne sera pas là demain.
To put it simply
It's a complicated project, that is to say, to put it simply, we need more time.
C'est un projet compliqué, c'est-à-dire, pour faire simple, on a besoin de plus de temps.