1nat·u·ral 
/ˈnætʃərəl/ adjective
/ˈnætʃərəl/ adjective 1 a : existing in nature and not made or caused by people : coming from nature
▪ natural silk ▪ furniture made of natural materials ▪ The river forms a natural boundary between the two countries. ▪ That's not his natural hair color. [=he dyes his hair] ▪ a natural lake [=a lake that is not man-made] ▪ She prefers to use natural light [=light from the sun] when taking photographs. ▪ a country rich in natural resources [=a country that has many valuable plants, animals, minerals, etc.] ▪ learning more about the natural world [=animals, plants, etc.]
b : not having any extra substances or chemicals added : not containing anything artificial
▪ natural soap/yogurt ▪ natural foods like whole grain bread and fresh vegetables ▪ Our bakery uses all-natural ingredients. [=ingredients that are from nature and not artificial] 2 : usual or expected : normal
▪ Gray hair is one of the natural consequences of getting older. ▪ a natural increase in the population ▪ the natural course of the disease ▪ It's perfectly/only natural to feel nervous before a test. ▪ He died of natural causes. [=he died because he was ill or old and not by being killed in an accident, battle, etc.] — see also natural childbirth 3 always used before a noun — used to describe a quality, ability, etc., that a person or animal is born with and does not have to learn ▪ The science class will encourage his natural curiosity. ▪ She has a natural talent for art. ▪ He has a natural ability to make people feel comfortable. ▪ She's a natural athlete/leader. [=she has natural abilities that make her a good athlete/leader] 4 ◊To be/act/look natural is to be normal and relaxed in the way you behave and look.
▪ I'm going to take your picture but don't pose—look natural. ▪ Try to be/act natural. 5 always used before a noun a : related by blood
▪ his natural mother [=the woman who gave birth to him] ▪ She was adopted immediately after she was born and never knew her natural [=(more commonly) birth] parents.
b old-fashioned : born to parents who are not married to each other : illegitimate
▪ a natural son/daughter 6 of a choice, decision, etc. : logical and reasonable
▪ We considered our options, and this car was the natural choice. [=the choice that made the most sense] ▪ He is the natural choice to succeed his father as company president. ▪ They made the natural decision to keep trying. 7 always used before a noun, formal : based on a sense of what is right and wrong
▪ natural justice/law 8 music : neither a sharp nor flat
▪ B natural ▪ F natural
▪ natural silk ▪ furniture made of natural materials ▪ The river forms a natural boundary between the two countries. ▪ That's not his natural hair color. [=he dyes his hair] ▪ a natural lake [=a lake that is not man-made] ▪ She prefers to use natural light [=light from the sun] when taking photographs. ▪ a country rich in natural resources [=a country that has many valuable plants, animals, minerals, etc.] ▪ learning more about the natural world [=animals, plants, etc.]
b : not having any extra substances or chemicals added : not containing anything artificial
▪ natural soap/yogurt ▪ natural foods like whole grain bread and fresh vegetables ▪ Our bakery uses all-natural ingredients. [=ingredients that are from nature and not artificial]
▪ Gray hair is one of the natural consequences of getting older. ▪ a natural increase in the population ▪ the natural course of the disease ▪ It's perfectly/only natural to feel nervous before a test. ▪ He died of natural causes. [=he died because he was ill or old and not by being killed in an accident, battle, etc.] — see also natural childbirth
▪ I'm going to take your picture but don't pose—look natural. ▪ Try to be/act natural.
▪ his natural mother [=the woman who gave birth to him] ▪ She was adopted immediately after she was born and never knew her natural [=(more commonly) birth] parents.
b old-fashioned : born to parents who are not married to each other : illegitimate
▪ a natural son/daughter
▪ We considered our options, and this car was the natural choice. [=the choice that made the most sense] ▪ He is the natural choice to succeed his father as company president. ▪ They made the natural decision to keep trying.
▪ natural justice/law
▪ B natural ▪ F natural
— nat·u·ral·ness /ˈnætʃərəlnəs/ noun [noncount]
▪ his naturalness as an actor ▪ the naturalness of his acting
/ˈnætʃərəlnəs/ noun [noncount] ▪ his naturalness as an actor ▪ the naturalness of his acting
