English definition of “form”
BEGIN [I, T] › to begin to exist, or to make something begin to exist: [often passive] We are learning more about how stars are formed. The trees form new leaves once the weather improves.
SHAPE [I, T] › to take or to make something take a particular shape: Hold hands and form a circle. Form the dough into little balls.
COMBINE [T] › to make something by combining different parts: In English you form the present participle by adding -ing to the verb.
START [T] › to start an organization or business: Brown formed her own company eleven years ago.
BE [T] › to be the thing talked about or be part of it: The Alps form a natural barrier between Italy and Switzerland. Her diary forms the basis of the book.
form an opinion/impression, etc › to begin to have a particular opinion or idea about something because of the information you have