that is to say

Definition of That Is To Say in English :

1. namely, that is to say, to wit, videlicet, viz.

as follows

WordNet Lexical Database for English. Princeton University. 2010.

That Is To Say

in other words; more explicitly

in other words; that means

v. said (sĕd), say·ing, says (sĕz)

v.tr.

1. To utter aloud; pronounce: The children said, "Good morning."

2. To express in words: Say what's on your mind.

3.

a. To state as an opinion or judgment; declare: I say let's eat out.

b. To state as a determination of fact: It's hard to say who is right in this matter.

c. To report or maintain; allege: It is said he is a fraud.

4. To repeat or recite: said grace.

5.

a. To indicate; show: The clock says half past two.

b. To give nonverbal expression to; signify or embody: It was an act that said "devotion."

6. To suppose; assume: Let's say that you're right.

v.intr.

To make a statement or express an opinion or judgment: The story must be true because the teacher said so.

n.

1. A turn or chance to speak: Having had my say, I sat down.

2. The right or power to influence or make a decision: Citizens have a say in the councils of government. All I want is some say in the matter.

3. Archaic Something said; a statement.

adv.

1. Approximately: There were, say, 500 people present.

2. For instance: a woodwind, say an oboe.

interj.

Used to express surprise or appeal for someone's attention.