fact meaning
EN
[fækt] [-ækt] 
US WFact
- A fact is something that has really occurred or is actually the case. The usual test for a statement of fact is verifiability, that is, whether it can be demonstrated to correspond to experience. Standard reference works are often used to check facts.
- NounPLfacts
- (archaic) Action; the realm of action.
- After that Richard, the third of that name, king in fact only, but tyrant both in title and regiment [ …] was [ …] overthrown and slain at Bosworth Field; there succeeded in the kingdom [ …] Henry the Seventh.
- (law, obsolete except in set phrases) A wrongful or criminal deed.
- (obsolete) Feat.
- When he who most excels in fact of arms,
- An honest observation.
- Something actual as opposed to invented.
- In this story, the Gettysburg Address is a fact, but the rest is fiction.
- Something which is real.
- Gravity is a fact, not a theory.
- Something which has become real.
- The promise of television became a fact in the 1920s.
- Something concrete used as a basis for further interpretation.
- Let's look at the facts of the case before deciding.
- An objective consensus on a fundamental reality that has been agreed upon by a substantial number of experts.
- There is no doubting the fact that the Earth orbits the Sun.
- Information about a particular subject, especially actual conditions and/or circumstances.
- The facts about space travel.
- (archaic) Action; the realm of action.
- Interjection
- More Examples
- Used in the Middle of Sentence
- Among ethnologists what is certainly an idiographic approach is often pursued with the most ascetic toughmindedness. Where fact reigns supreme, any attempt at theory may appear tenderminded.
- Postcards from Florida might mean someone is rubbing in the fact he or she has been lounging on the white, sandy beaches
- People tend to lump turtles and tortoises together, when in fact they are different creatures.
- Used in the Ending of Sentence
- I couldn't get across to the board this simple economic fact.
- Ah, you "believe". You do not know. So you admit that it's just wishful thinking, an ass pull not based on any facts.
- Used in the Middle of Sentence
Definition of fact in English Dictionary
- Part-of-Speech Hierarchy
- Interjections
- Nouns
- Countable nouns
- Countable nouns
- Interjections
Source: Wiktionary
Grammatically, this word "fact" is an interjection. It's also a noun, more specifically, a countable noun.