That is to say

Pro Tip 1/3

Clarification Tool

Use 'that is to say' to make sure the listener understands exactly what you mean.

You'll be in charge, that is to say, you're the team leader for this project.

Pro Tip 2/3

Avoid Ambiguity

It helps prevent misunderstandings by providing clarity to a previous statement.

I enjoy solitary activities, that is to say, I like being alone.

Pro Tip 3/3

Emphasize a Point

Use it to emphasize the most important part of your message.

She is a vegetarian, that is to say, she doesn't eat any meat at all.