B1[T]to invent something or bring something into existence: We must develop a new policy/strategy to deal with the problem.The company is spending $650 million on developing new products/technology.Inventing, designing and innovationCreating and producingC2[I]to start to happen or exist: Large cracks began to develop in the wall.Starting and beginningStarting againB2[I or T]If you develop an illness or problem, or if it develops, you start to suffer from it: The study showed that one in twelve women is likely to develop breast cancer.She's developed some very strange habits lately.Being and falling ill›[T]to build houses, factories, shops, etc. on a piece of land: They're planning to develop the whole site into a shopping complex.Construction work and workers