natural meaning
EN
[ˈnæt͡ʃ.(ə).ɹəl] 
US - NounPLnaturals
- (now rare) A native inhabitant of a place, country etc.
- (music) A note that is not or is no longer to be modified by an accidental, or the symbol ♮ used to indicate such a note.
- One with an innate talent at or for something.
- He's a natural on the saxophone.
- An almost white colour, with tints of grey, yellow or brown; originally that of natural fabric.
- natural colour:    
- (archaic) One with a simple mind; a fool or idiot.
- COL (chiefly Britain) One's natural life.
- (now rare) A native inhabitant of a place, country etc.
- AdjectiveCOMmore naturalSUPmost natural
- That exists and evolved within the confines of an ecosystem.
- The US supreme court has ruled unanimously that natural human genes cannot be patented, a decision that scientists and civil rights campaigners said removed a major barrier to patient care and medical innovation.
- Of or relating to nature.
- In the natural world the fit tend to live on while the weak perish.
- Without artificial additives.
- Natural food is healthier than processed food.
- As expected; reasonable.
- It's natural for business to be slow on Tuesdays.
- His prison sentence was the natural consequence of a life of crime.
- (music) Neither sharp nor flat. Denoted ♮.
- The piece is played in C natural.
- (music) Produced by natural organs, such as those of the human throat, in distinction from instrumental music.
- (music) Applied to an air or modulation of harmony which moves by easy and smooth transitions, digressing but little from the original key.
- Without, or prior to, modification or adjustment.
- the natural motion of a gravitating body
- The chairs were all natural oak but the table had a lurid finish.
- Having the character or sentiments properly belonging to one's position; not unnatural in feelings.
- OBS Connected by the ties of consanguinity.
- OBS Born out of wedlock; illegitimate; bastard.
- a natural child
- (of sexual intercourse) Without a condom.
- We made natural love.
- That exists and evolved within the confines of an ecosystem.
- More Examples
- Used in the Middle of Sentence
- From this vantage point we can observe the behavior of the animals in their natural habitat.
- Final preparation was done at the microvertebrate laboratory of the Royal Belgian Institute of Natural Sciences.
- An orthopox model utilizing calpox virus was developed concomitant with our studies and showed that marmosets were indeed susceptible to low levels of a poxvirus by a natural route [29 , 30 ].
- Used in the Middle of Sentence
Definition of natural in English Dictionary
- Part-of-Speech Hierarchy
- Adjectives
- Nouns
- Countable nouns
- Countable nouns
- Adjectives
- en naturally
- en naturalist
- en naturals
- en naturall
- en naturalize
Source: Wiktionary
Grammatically, this word "natural" is an adjective. It's also a noun, more specifically, a countable noun.