If you say that it is natural for someone to act in a particular way or for something to happen in that way, you mean that it is reasonable in the circumstances.

Natural behaviour is shared by all people or all animals of a particular type and has not been learned.

Someone with a natural ability or skill was born with that ability and did not have to learn it.

If you say that someone is a natural, you mean that they do something very well and very easily.

If someone's behaviour is natural, they appear to be relaxed and are not trying to hide anything.

Natural things exist or occur in nature and are not made or caused by people.

Someone's natural parent is their biological father or mother, as opposed to an adult who is looking after them or has adopted them. Someone's natural child is their biological son or daughter, as opposed to a child they are looking after or have adopted.

In music, a natural note is the ordinary note, not its sharp or flat form.

If someone dies of or from natural causes, they die because they are ill or old rather than because of an accident or violence.