that is meaning
EN- Adverb
- (conjunctive) In other words; that is to say. Used to introduce a clarification or explanation.
- (conjunctive) In other words; that is to say. Used to introduce a clarification or explanation.
- More Examples
- Used in the Middle of Sentence
- But I so want to see the Queen when she visits our town! That is so not true!
- However, the koholiines differ from hyainailourines in featuring a robust angular process that is preceded anteriorly by a concavity (Fig 5 , Feature 14; Table 1 ).
- The club that is now mostly used for golf was once a common weapon.
- Used in the Beginning of Sentence
- That is the Gulfe of Greedinesse, they say, That deepe engorgeth all this worldes pray...
- That is a serious accusation, so make sure you have plenty of evidence before you point the finger at someone.
- That is right; — keep to your 'magnum opus' — magnoperate away.
- Used in the Middle of Sentence
Definition of that is in English Dictionary
- Part-of-Speech Hierarchy
- Adverbs
- Conjunctive adverbs
- Uncomparable adverbs
- Conjunctive adverbs
- Adverbs
Source: Wiktionary
Grammatically, this idiom "that is" is an adverb, more specifically, a conjunctive adverb and an uncomparable adverb.