A form of something is a type or kind of it.

When something can exist or happen in several possible ways, you can use form to refer to one particular way in which it exists or happens.

When a particular shape forms or is formed, people or things move or are arranged so that this shape is made.

The form of something is its shape.

You can refer to something that you can see as a form if you cannot see it clearly, or if its outline is the clearest or most striking aspect of it.

If something is arranged or changed so that it becomes similar to a thing with a particular structure or function, you can say that it forms that thing.

If something consists of particular things, people, or features, you can say that they form that thing.

If you form an organization, group, or company, you start it.

When something natural forms or is formed, it begins to exist and develop.

If you form a relationship, a habit, or an idea, or if it forms, it begins to exist and develop.

If you say that something forms a person's character or personality, you mean that it has a strong influence on them and causes them to develop in a particular way.

In sport, form refers to the ability or success of a person or animal over a period of time.

A form is a paper with questions on it and spaces marked where you should write the answers. Forms usually ask you to give details about yourself, for example when you are applying for a job or joining an organization.

If you say that it is bad form to behave in a particular way, you mean that it is rude and impolite.

If you say that someone is in good form, you mean that they seem healthy and cheerful.

If you say that someone is off form, you think they are not performing as well as they usually do.

If you say that someone is on form, you think that they are performing their usual activity very well.

When something takes form, it develops or begins to be visible.

If someone or something behaves true to form, they do what is expected and is typical of them.